Britney Spears Cameos in Pussycat Dolls Music Video

Britney Spears has already recorded her a cameo for the Pussycat Dolls “When I Grow Up Music Video.

The Dolls filmed their dance sequences in Hollywood on Tuesday and Wednesday. Brit shot her scenes at the WB lot in Burbank on Wednesday.

“It was carefully planned out,” a set source told Us Weekly. “In the scene shot [Wednesday], Britney is driving in a car. They all wave at each other as they are passing in traffic – that is it. It is genius and you will love it! Of course, Britney looks hot and blonde.”

Adds the source, “It is a very short sequence, but [Britney] had a lot of fun with it. [She] really likes the Dolls’ music and when she saw them on the MTV [Movie Awards], she was totally down to do the video.”