The beginning of the summer just got really hot! Check out The Pussycat Dolls brand new single "When I Grow Up" from their new album coming out later this summer. Nicole Scherzinger, Ashley Roberts, Jessica Sutta, Melody Thornton and Kimberly Wyatt are back. The Grammy-nominated quintet kicked off the beginning of the summer in a big way with performances of "When I Grow Up" on Jimmy Kimmel Live! and they'll do it again at the 2008 MTV Movie Awards on June 1. The Dolls will also been seen hosting and performing on VH1's "Maxim Hot 100"; and their E! "True Hollywood Story" premiered May 23.

The Pussycat Dolls on Jimmy Kimmel Live:

"When I Grow Up" is the first single from the follow-up to PCD, the 2005 debut album that put the Dolls on the global pop map. The Rodney Jerkins-produced track was released commercially on May 27.

The Pussycat Dolls' first album, PCD, has sold over 7 million copies worldwide, on the strength of 5 massive hit singles ("Don't Cha," "Stickwitu," "Beep," "Buttons" and "Wait a Minute.") They toured the globe with The Black Eyed Peas and Christina Aguilera and made millions of fans along the way.

The Pussycat Dolls' second album will be released later this summer.

The Pussycat Dolls "When I Grow Up":