WATCH: Katy Perry is Kathy Beth Terry for 'Last Friday Night'

Katy Perry who? Kathy Beth Terry is the star of Katy's new music video for "Last Friday Night (T.G.I.F.)".

"Kathy Beth Terry" (played by Katy, of course) is a headgear-wearing geek who stars in a new teaser for the video. Fans are asked to "Like" Kathy Beth Terry on Facebook and follow @KathyBethTerry on Twitter. On the Twitter page, Kathy Beth describes herself by writing, "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!"

Watch the teaser above; the full video is set to premiere on June 14.