Katy Perry's Teen Choice Awards Quick Changes!

The hostess channels her inner geek, cheerleader, prom queen, goth rocker and more!

BABE ALERT

That's more like it! Perry switches into a glittery bandage dress before appearing onstage with her co-hosts for the evening – Glee cuties Mark Salling, Cory Monteith, Kevin McHale and Chris Colfer.