Katy Perry has adopted a geeky alter ego and set up Facebook and Twitter accounts in her name.
The glamorous pop star will appear as braces-wearing Kathy Beth Terry in the upcoming music video for her next single, "Last Friday Night (T.G.I.F.)."
Fictional Terry is already a hit online – thousands of Facebook users have ';liked' her page, which displays a list of the 13-year-old student's interests including the solar system, science fairs, Sudoku puzzles and Hanson.
Perry has also been busy ';Tweeting' as Terry, writing: "Mom is making me go shopping at Mervyn's today for a training bra. Wish she'd take me to Victoria's Secret like everybody else! SO emBRAassing."
Check out a preview of the music video, which is set to premiere on June 14.