After a brief break, The Pussycat dolls returned in May 2008 with the new single "When I Grow Up" - the first release from their second album. The song was performed live for the first time on May 20, on Jimmy Kimmel Live and again at the MTV Movie Awards on June 1. They also performed the song at the first results show of the 2008 season of So You Think You Can Dance. The song was released on May 27 2008. The song charted in the top 40 in most countries. The song charted at number nine on the U.S. Billboard Hot 100 and number one on the Billboard Hot Dance Club Play. The song charted at number six on the European Singles Chart. Other promotions include hosting the 2008 Maxim Hot 100 on VH1 on the position number seventeen.
The second studio album from the Pussycat Dolls was scheduled for release worldwide on September 20 2008, and in the U.S. on September 23, with tracks produced by Dr. Dre, Timbaland, Eminem, The Clutch, Sean Garrett, Quiz & Larossi, New Kids On The Block, Scott Storch, Darkchild, Fernando Garibay, Ryan Tedder, Mark Taylor, Taio Cruz,[23] and others.[24] Two other confirmed tracks are "Bottle Pop" and "Away" which were written and produced by Fernando Garibay.
On May 28 they confirmed in a radio interview that one of the tracks from the album is titled "In Person", and that it has a '1960s' vibe, a la Tina Turner. Timbaland will be the executive producer of the album.
The second song from the album will be "Whatcha Think About That" featuring rapper Missy Elliott. The video was shot on September 9 and 10 in Los Angeles.
They performed their hit singles "Buttons" and "When I Grow Up" at the MTV Asia Awards 2008 in Genting Highlands, Malaysia and performed in Singapore for Singfest 2008, as part of a line-up of international music acts. They performed the singles "Buttons", "Don't Cha", and "When I Grow Up", including a special solo dance segment "Show Me What You Got".