Watch Katy Perry Get Nerdy in 'Last Friday Night (TGIF)' Music Video Tease

Braces, vomit and Rebecca Black? If those things sound exciting, then you'll definitely want to check out the teaser for Katy Perry's latest music video! 

The California Gurl released a 30-second snippet for "Last Friday Night (TGIF)," the latest (and fifth!) single off herTeenage Dreams album. The full video won't be released until June 14, but the teaser for the music video gives fans a pretty good sense of what they're in for – and it's completely ridiculous. 

If you blink, you'll probably miss Rebecca Black, who makes the briefest of cameos during a party scene. But what you won't miss is a good half-minute of Perry looking her nerdiest as she shows us her alter-ego, 13-year-old Kathy Beth Terry, a braces-wearing, bio-nerd type who ends up vomiting into a shoe. Sounds like your typical Friday night, right?