Beyonce discussed her live performance at the inauguration, Twittering, and her summer 2009 I AM…. North American Tour on the Late Show with David Letterman Wednesday night.

Beyonce proves that she can sing live with a performance of “Halo” on Letterman. (VIDEO)

Bey –whose new romantic-thriller Obsessed opens in theaters this Friday –serenaded the Letterman audience with a LIVE rendition of her popular single “Halo.”