Question: Svetha Rao, professionally known as Raja Kumari, is an Indian American songwriter, rapper and recording artist from Claremont, California, Kumari is best known for her collaboration with notable artists including Gwen Stefani, she is a co-founder and the lead vocalist of which band?

full_context: Document 1: Raja Kumari: Svetha Rao (born January 11, 1986), professionally known as Raja Kumari ('The princess' in Sanskrit), is an Indian American songwriter, rapper and recording artist from Claremont, California. Kumari is best known for her collaboration with notable artists including Gwen Stefani, Iggy Azalea, Fifth Harmony, Knife Party, and Fall Out Boy. She is also notable for receiving as a songwriter, the BMI Pop Awards in 2016, being nominated to a Grammy award in February 2015, and featuring on BBC Asian Network programme "Bobby Friction" on July 5, 2016.
Document 2: 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 3: Raj Ramayya: Raj Ramayya is a session singer/composer and part of the duo Beautiful Losers with guitarist Brett Boyd.
Document 4: 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 5: 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 6: Badshah (rapper): Aditya Prateek Singh Sisodia, better known by his stage name Badshah, is an Indian rapper known for his Hindi, Haryanvi, and Punjabi songs. He started his career in 2006 alongside Yo Yo Honey Singh in his group Mafia Mundeer and gained spontaneous popularity among youth. He split from Honey in 2012 and gained fame with his independent Haryanvi song "Kar Gayi Chull", which was later adopted into Bollywood movie. His music has been featured in Bollywood soundtracks for films such as the 2014 film "Humpty Sharma Ki Dulhania". and Sonam Kapoor starrer "Khoobsurat" (2014).
Document 7: Sniti Mishra: Sniti Mishra is a trained vocalist in Hindusthani classical music who appeared for the first time in the Zee TV musical reality show, "Sa Re Ga Ma Pa Singing Superstar". She had been associated with Indo-Swedish Fusion jazz band Mynta. She has also worked with the percussionist Sivamani and Grammy Award- nominated jazz musician-keyboardist Louis Banks. She has performed classical and fusion concerts in India and worldwide. She was honored with 'Baji Rout Samman' for the year 2016 by Utkala Cultural Association, IIT Bombay.
Document 8: 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 9: Sumedha Karmahe: Sumedha Karmahe is an Indian vocalist and performing artist, well known for her scintillating voice and versatile singing. She has performed in different television shows like Sa Re Ga Ma Pa Challenge 2007, Ek Se Badhkar Ek, Dulhan, Maayeka, Ranbir Rano, Saregamapa 2009, Saregamapa Mega Challenge on Zee TV, IPL Rockstars on Colors, The Jam Room on Sony Mix. Her first released playback was in a Santosh Sivan film named Tahaan. She has done playbacks in 5 different languages. Till date she has 3 singles - Bawre Nain, Yaadein, Darmiyaan to her credit. Recently she has given her voice for songs like Toota Jo kabhi Taara along with Atif Aslam for the movie A Flying Jatt, Tum Tum Tum Ho along with Arijit Singh for the movie Fuddu.
Document 10: Shilpa Narayan: Shilpa Narayan is a pop/R&B singer-songwriter based in New York City. She made her debut in 2012 and released her first album "Stand Alone" with the self-title single "Stand Alone" and "Change Your Mind". Shilpa has worked with prominent hip-hop artists such as Waka Flocka, Wale and Culture Shock and has performed at New York Fashion Week 2010.
Document 11: Sidhi Kumari: Sidhi Kumari is a member of Rajasthan Legislative Assembly from Bikaner East, elected in 2008 on as a candidate of Bharatiya Janata Party. She was born in 1973 and studied up to M A. She is director of museum at Lalgarh Palace. She is daughter of NARENDRA SINGH Bahadur of erstwhile kingdom of Bikaner and grand daughter of Maharajah Sri Dr. Karni Singh Bahadur of Bikaner.
Document 12: 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 13: 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 14: 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 15: 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.
ground_truth: No Doubt