Casual in sweats, Tatum's ready for takeoff in L.A. Plus: Katy & Russell, Justin Bieber, Jessica Alba and more

  • SLEIGH BELLE photo | Katy Perry, Russell Brand

Credit: Hammond/Despois/Splash News Online

Published: Wednesday Dec 23, 2009 | 05:00 PM EST

SLEIGH BELLE

Days after shopping together in East London, Katy Perry and comedian boyfriend Russell Brand raise the adventure level a bit, hitting London's Hampstead Heath for a sled ride Wednesday.