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 (sic)."
In a preview clip for the music video, due to premiere on Tuesday (14Jun11), Perry as Terry can be seen getting drunk at a house party, throwing up into a roller skate and accidentally flashing her breast while dancing.