Stars' Pajama Party!

Demi Lovato's slumber party to Kim Kardashian's hot-pink retainer, see how the stars get ready for zzz's in their Twitter pics!

  • KATY PERRY photo | Katy Perry

Credit: Courtesy Katy Perry

Updated: Tuesday Oct 12, 2010 | 06:00 AM EDT By: Cara Lynn Shultz

KATY PERRY

The singer celebrated her album Teenage Dream topping the charts with "my new South Park pj's" – and an adult beverage! – on her tour bus.