Britney Spears has filmed a cameo for the new Pussycat Dolls video 'When I Grow Up'.
The video for the song was filmed on Wednesday in Los Angeles.Britney will be seen driving a car and waving to the Pussycat Dolls as they pass in traffic.
'When I Grow Up' will be the first single from the second Pussycat Dolls album.
The yet-to-be titled album will be released in September.










