NYC
08/25/2010 02:23 pm ET | Updated May 25, 2011

Katy Perry, Drew Barrymore Visit Letterman (PHOTOS)

Katy Perry and Drew Barrymore dropped by the Ed Sullivan Theater to appear as guests on The Late Show With David Letterman.

Perry performed "Teenage Dream" and Barrymore promoted her new movie Going the Distance.

See the stars strut their stuff, before heading inside for the taping, in the photos below: