Katy Perry Whips Up A Cool Concert In NYC For The Web!

Katy Perry gave a web concert last night live from NYC in the Late Night With David Letterman studios, where she performed her hit singles and new tracks off her latest album, Teenage Dream.

You can watch the full concert here on Socialite Life after the jump!

Check out the gallery below of Katy throughout the day (changing outfits a bit I’d say) and then leaving the Letterman taping with fiance Russell Brand!