Subsequent singles, "Stickwitu and "Buttons" also reached the top five on the Billboard Hot 100 chart. PCD went on to sell seven million copies worldwide and established the Pussycat Dolls as viable in the music industry earning them a reputation among the century's few breakout successes. Thornton was featured on Jibbs' single "Go Too Far", which was released on March 2007; it entered the top-twenty on the New Zealand Singles Chart. Their second and final studio album Doll Domination was released in September 2008, the album attained its highest peak position on the US Billboard 200, but it is considered a commercial disappointment selling less than 400,000 copies in the US. Doll Domination included the singles "When I Grow Up" and "I Hate This Part", which reached the top twenty on the US Billboard Hot 100 chart. In January 2009, the group embarked on the Doll Domination Tour, their second headlining concert tour, which highlighted stops in Europe, Oceania and Asia, and grossed over $14 million. Following the release of the group's single 2009 "Jai Ho! (You Are My Destiny)", tensions in the group rose due to Scherzinger being billed as a featured artist on the release. This would go on to lead to a public outburst by Thornton during the group's tour appearance while opening for The Circus Starring Britney Spears. The group would then announce a hiatus; Thornton then cameoed on Keri Hilson's music video "Slow Dance" and appeared as a panelist on E!'s Bank of Hollywood in which contestants must appeal to a celebrity panel to receive money. It lasted for one season. In June 2010, Thornton confirmed she had departed the Pussycat Dolls and was working on a solo album. 2011–2017: P.O.Y.B.L and other projects Since her departure from the Pussycat Dolls, Thornton has remained an independent artist. On February 20, 2010, in an interview for The Source Thornton explained that her songs will be different from the group's sound but will not going to abandon that pop demographic that she acquired through the Pussycat Dolls. In June 2010 Rap-Up first announced that Thornton was working on her solo album with collaborators including Cee Lo Green, Polow da Don, and Lil Wayne. On Vibe Magazine she stated that she is also working with Dre and Vidal. Thornton's recording of the Cee Lo produced song "Love Gun" leaked to the internet around this time. The song was