Katy Perry dropped a sneak peek of her "Last Friday Night" video on Tuesday - a song she calls a "total vapid, slut jam" - and introduced the world to her geeky teenage alter-ego, Kathy Beth Terry. "Sasha Fierce is to Beyonce as @kathybethterry is to me," Perry tweeted. "Yes my alter ego has been borned."
Kathy Beth Terry, pictured above, describes herself as follows in her bio: "I'm 13 and in the 8th grade. I like Sudoku puzzles, the solar system, high-school science fairs, Skip-It, Weenie Babies and LOVE JTT!"