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

Context paragraphs:
The Listening Sessions: The Listening Sessions was the debut concert tour by American singer Ariana Grande.  The tour supported Grande's debut studio album, "Yours Truly", which was released August 30, 2013.  The tour began on August 11, 2013 and concluded September 22, 2013 and showcased all of the material from Grande's debut studio album, with the exception of "Popular Song".  The tour grossed $679,360 from 11 shows across North America.  The tour was said to expand after the release of "Yours Truly", but failed to materialize due to Grande's acting schedule and recording sessions for her second studio album, "My Everything".

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.

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.

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."

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".

Hypersonic Hyperphonic: Hypersonic Hyperphonic is the second studio album by Tinfed, released on December 3, 1996 by Re-Constriction Records.  "Sonic Boom" noted that "Tinfed is one of those bands who would fit perfectly on tour with the likes of God Lives Underwater, Stabbing Westward, Filter & Gravity Kills which means they should do rather well with the current crossover audience."

Yummy (Gwen Stefani song): "Yummy" is a song recorded by American singer and songwriter Gwen Stefani, featuring American musician Pharrell Williams, from her second solo studio album, "The Sweet Escape" (2006).  The track was released on November 11, 2006 as a promotional single for the parent album's release through Interscope Records.  It was developed during several sessions in Miami, Florida and Hollywood, California in July 2005, for an intended EP or as extra tracks on her video album "Harajuku Lovers Live" (2005).  The song was written by Stefani and Williams and produced by The Neptunes.  Musically, the collaboration is a dance-pop recording with a "day-glo" rap.  Its lyrics deal with food, sexual intercourse, and the roles that an individual may have within a household.

Weezer discography: The discography of Weezer, an American rock band, consists of 10 studio albums, two compilation albums, one video album, six extended plays, twenty-eight singles and twenty-four music videos. Weezer's self-titled debut studio album, often referred to as "The Blue Album", was released in May 1994 through DGC Records.  The album was a huge commercial success, peaking at number 16 on the US "Billboard" 200 and spawning the singles "Undone – The Sweater Song" and "Buddy Holly", both of which were responsible for launching Weezer into mainstream success with the aid of music videos directed by Spike Jonze.  It has sold 3.3 million copies in the United States and has been certified triple platinum by the Recording Industry Association of America (RIAA), becoming the band's best selling album to date.  Following the success of their debut album, Weezer took a break from touring for the Christmas holidays.  Lead singer Rivers Cuomo began piecing together demo material for Weezer's second studio album.  Cuomo's original concept for the album was a space-themed rock opera, "Songs from the Black Hole".  Ultimately, the "Songs from the Black Hole" album concept was dropped; the band, however, continued to utilize songs from these sessions into work for their second studio album. " Pinkerton" was released as the band's second studio album in September 1996.  Peaking at number 19 on the "Billboard" 200, it was considered a critical and commercial failure at the time of its release, selling far less than its triple platinum predecessor.  However, in the years following its release, it has seen much critical and commercial championing.

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.

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.

Supporting paragraphs: Harajuku Lovers Tour Gwen Stefani
Answer: "The Sweet Escape"