Question: What was the second studio album of the singer featured in the Harajuku Lovers Tour?

full_context: Document 1: L.A.M.B.: L.A.M.B. was a fashion line by American singer Gwen Stefani, the lead vocalist of the rock band No Doubt. The line manufactured apparel and fashion accessories. It was founded in 2003 and made its runway debut in 2004. The fashion line manufactured accessories like shoes, watches, bags and a fragrance called "L." The name is an acronym of her debut solo album "Love. Angel. Music. Baby".
Document 2: Harajuku Lovers Tour: The Harajuku Lovers Tour was the first solo concert tour of American recording artist Gwen Stefani. The tour began through October to November 2005, to support of her debut studio album "Love. Angel. Music. Baby." (2004). Although Stefani embarked on multiple tours with her band No Doubt, she initially opted not to participate in a tour to promote her album, an attitude that the singer eventually abandoned due to the commercial success of "Love. Angel. Music. Baby."
Document 3: List of Britney Spears live performances: American singer Britney Spears has embarked on six headlining concert tours, five of which have been worldwide. She first served as an opening act for NSYNC before starting her 1999–2000 headlining debut, the ...Baby One More Time Tour, which was based in North America only. Its success prompted an extension of dates entitled Crazy 2K. The tour was positively received by critics, but generated some controversy due to her racy outfits. Jae-Ha Kim of the "Chicago Sun-Times" commented that "Spears has that 'it' factor that worked for pinup queens of the past." In 2000–01, she performed on the worldwide Oops!... I Did It Again World Tour. It was critically appreciated for Spears' energy and performance, as well as the band. She then followed this with the Dream Within a Dream Tour in 2001–02, visiting Japan and Mexico for the first time. The performances were accompanied by many special effects, the "pièce de résistance" being a water screen that pumped two tons of water onto the stage during the encore performance of "...Baby One More Time." In a show in Miami, Britney stopped the show three songs into the setlist because it was too dangerous to perform in the rain storm.
Document 4: Harajuku Lovers Live: Harajuku Lovers Live is the first live long-form video by American recording artist Gwen Stefani. It was released on DVD on December 4, 2006, by Interscope Records. The DVD was directed by Sophie Muller and produced by Oil Factory Productions. It is a recording of one of Stefani's concerts during her Harajuku Lovers Tour 2005 in late 2005 to promote her first album, "Love. Angel. Music. Baby.", released in November 2004. The performance was recorded in November 2005, in Anaheim, California. The concert features performances of all twelve songs from "Love. Angel. Music. Baby." and two new songs from her second studio album, "The Sweet Escape", as well as interviews with the musicians and dancers and a documentary of tour preparation.
Document 5: List of Lady Gaga live performances: American singer Lady Gaga has embarked on five concert tours and performed live at various award ceremonies and television shows. Gaga promoted her debut single "Just Dance" through performances at several award ceremonies and television shows, including Miss Universe 2008 and "So You Think You Can Dance". She first served as an opening act for the boy band New Kids on the Block and the girl group The Pussycat Dolls, before beginning her own headlining tour, The Fame Ball Tour, which began in March 2009 and ended in September 2009. Following the canceled tour with rapper Kanye West, Gaga embarked on her second worldwide concert tour The Monster Ball Tour. Staged in support of her extended play "The Fame Monster" (2009), the tour was critically acclaimed and grossed $227.4 million, making it one of the highest-grossing concert tours of all time. Gaga also performed songs from the album at award ceremonies—the American Music Awards of 2009, 52nd Annual Grammy Awards and 2010 Brit Awards. At the 2010 "Billboard" Touring Awards, Gaga won the Breakthrough Performer Award, as well as the Concert Marketing & Promotion Award.
Document 6: Wind It Up (Gwen Stefani song): "Wind It Up" is a song by American singer and songwriter Gwen Stefani. Originally written for inclusion on Stefani's Harajuku Lovers Tour, the song was later recorded for her second solo studio album, "The Sweet Escape" (2006). The track contains an interpolation of "The Sound of Music" song "The Lonely Goatherd".
Document 7: Long Way to Go (Gwen Stefani and André 3000 song): "Long Way to Go" is a song by American singer-songwriter Gwen Stefani with American rapper André 3000. The song appears as the closing track on Stefani's debut studio album, "Love. Angel. Music. Baby." (2004). It was released on November 23, 2004, along with the rest of "Love. Angel. Music. Baby." by Interscope Records. The track was written by both Stefani and 3000, while 3000 was the sole producer of the track. Despite being scrapped from André 3000's critically acclaimed OutKast studio album, "The Love Below" (2003), Stefani and 3000 finalized a reworked version of the song to be included on the former's album. The song prominently features a sample from Martin Luther King, Jr.'s "I Have a Dream" speech in its closing outro. King is not credited for contributed lyrics to the song. Musically, "Long Way to Go" is influenced by electronic music and alternative hip hop, with partial influence from both dance music and soul music.
Document 8: What You Waiting For?: "What You Waiting For?" is a song by American singer Gwen Stefani from her debut solo studio album, "Love. Angel. Music. Baby." (2004). Written by Stefani and Linda Perry, the song is the album's opening track and was released as Stefani's debut solo single. "What You Waiting For?" details Stefani's lack of inspiration, fear of producing the album, as well as her reaction to pressures exerted by her record label. It is primarily an electropop song and introduces Stefani's four back-up dancers, the Harajuku Girls, who had a major input into the album's production.
Document 9: The Sweet Escape (song): "The Sweet Escape" is a song by American singer and songwriter Gwen Stefani from her second studio album of the same name (2006). It was written by Stefani, Akon, and Giorgio Tuinfort. Akon, who is also a featured artist, developed the song's beat before collaborating with Stefani. He designed it based on her previous work with No Doubt, and Stefani later commented that it put her "on the yellow brick road to the No Doubt record I might do". "The Sweet Escape" is an apology for a fight between two lovers and describes a dream of a pleasant life for them. As the album's title track, its title was chosen to help market Stefani's music and fashion lines.
Document 10: Gwen Stefani: Gwen Renée Stefani ( ; born October 3, 1969) is an American singer, songwriter, fashion designer, actress, and television personality. She is a co-founder and the lead vocalist of the band No Doubt that experienced major success after their breakthrough studio album "Tragic Kingdom" (1995) along with various successful singles, including "Just a Girl", "Don't Speak", "Hey Baby", and "It's My Life". During the band's hiatus, Stefani embarked on a solo pop career in 2004 by releasing her debut studio album "Love. Angel. Music. Baby." Inspired by pop music from the 1980s, the album was met with both critical and commercial success. It spawned three commercially successful singles: "What You Waiting For?", "Rich Girl", and "Hollaback Girl", the latter reached number one on the "Billboard" Hot 100 while also becoming the first US download to sell one million copies. In 2006 Stefani released her second studio album "The Sweet Escape". The album produced two successful singles: "Wind It Up" and the album's title track "The Sweet Escape". Her third solo album "This Is What the Truth Feels Like" was released in March 2016 and became her first solo number-one album on the "Billboard" 200.
Document 11: Verizon Ladies First Tour: The Verizon Ladies First Tour was a co-headlining concert tour by American recording artists Beyoncé, Alicia Keys and Missy Elliott. Canadian artist Tamia was featured as a special guest. The tour, dubbed the "urban Lilith Fair" supported Elliott's fifth studio album, "This Is Not a Test!"; Keys' second studio album, "The Diary of Alicia Keys" and Beyoncé's first studio album, "Dangerously in Love". The trek visited the United States performing in over twenty cities in March and April. The outing was the first three-act show to feature three female R&B artist in a headlining role. It became one of the biggest tours in 2004, placing 34th on Pollstar's "Top Tours of 2004"—earning over 22 million dollars. The success of the tour promoted a 2005 leg but the plans were scrapped and Verzion focused on creating the Verizon VIP Tour.
Document 12: List of Rihanna concert tours: Barbadian recording artist Rihanna has embarked on four concert tours, three of which have been worldwide. Her 2006 debut, was based in North America only and supported her first and second studio album, "Music of the Sun" (2005) and "A Girl like Me" (2006). The tour lasted for three months, through which Rihanna performed 36 shows. The same year, Rihanna continued to tour as a special guest on the PCD World Tour with Pussycat Dolls, Roc the Block Tour with Jay-Z and Ne-Yo, and the Monkey Business Tour with Black Eyed Peas. In the period from 2007 till 2009, she performed on the worldwide Good Girl Gone Bad Tour in a support of her third studio album with same name. During the tour, Rihanna visited Europe, North America, Oceania, Asia and Africa. It featured Rihanna presenting completely different style and wearing leather outfits. The Good Girl Gone Bad Tour sparked controversy in Malaysia where the Pan-Malaysian Islamic Party recommended that Rihanna's concert tour should be banned due her provocative outfits. A DVD, titled "Good Girl Gone Bad Live" was released on June 16, 2008. It features the show from Evening News Arena in Manchester, England, held on December 6, 2007.
Document 13: This Is What the Truth Feels Like: This Is What the Truth Feels Like is the third studio album recorded by American singer and songwriter Gwen Stefani. It was released on March 18, 2016 by Interscope Records. Initially, the album was scheduled to be released in December 2014 with Stefani working with a handful of high-profile producers, and Benny Blanco serving as executive producer. However, after the underperformance of her 2014 singles and the writer's block Stefani suffered, she did not feel comfortable curating an album and scrapped the whole record in favor of starting again. The album's release was scheduled after Stefani hinted at it on her Twitter account.
Document 14: List of songs recorded by Gwen Stefani: American singer and songwriter Gwen Stefani has recorded material for three studio albums and one extended play (EP), and has been featured on songs on other artists' respective albums. After releasing five studio albums with ska punk group No Doubt, in 2004 Stefani began work as a solo artist, developing her pop debut "Love. Angel. Music. Baby." in the same year. It produced several top ten singles worldwide, including "What You Waiting For?", "Rich Girl", and "Hollaback Girl", the latter of which was the first single to sell over a million digital copies in the United States. The record contained work from a variety of producers and songwriters, including Linda Perry, Nellee Hooper, André 3000, and No Doubt bandmate Tony Kanal. "Cool", "Luxurious", and "Crash" were also released as the singles. In 2005, Stefani released an extended play "Love. Angel. Music. Baby. (The Remixes)" and included the Richard X remix of "Cool", which topped the United States Dance Club Songs in November 2005. Hip hop musician André 3000 made two appearances on the album, including on "Long Way to Go", and his alter ego "Johnny Vulture" on "Bubble Pop Electric".
Document 15: List of Demi Lovato live performances: American singer Demi Lovato has embarked six concert tours and performed live at various award ceremonies and television shows. Her debut promotional tour in 2008, Demi Live! Warm Up Tour was based in North America only and supported her debut studio album, "Don't Forget" (2008). At the same year, Lovato served as one of the opening acts for Jonas Brothers on their fifth concert tour, Burnin' Up Tour. Lovato also served as one of the opening acts for Avril Lavigne on her third concert tour, The Best Damn World Tour on selected dates in North America. In 2009, Lovato performed as the opening act on the Jonas Brothers World Tour 2009 with Jonas Brothers during the South American and European legs, before she continued to tour her first headlining tour, during Summer 2009, promoting her debut album "Don't Forget" and her sophomore album "Here We Go Again". The tour featured opening acts, David Archuleta, Jordan Pruitt and KSM. In 2010, Lovato performed as the opening act on Jonas Brothers' Live in Concert World Tour 2010. On November 1, 2010, Lovato left the tour after a dispute arose to the public light involving her apparently punching one of the dancers of the tour. After Lovato left, she was interned in a treatment center to seek out help.
ground_truth: "The Sweet Escape"