Check out this video of Keri Hilson performing “Knock You Down” on “The Late Show with David Lettermen.” She rocks out with a full band in the back round, and back up dancers that make her performance look like a well choreographed music video. I almost forgot to mention, Kanye West comes out to perform with Keri towards the end of the song. It seemed as if he was back to his old way, dropping the auto-tune and harmonies for a lyrically savvy verse that is reminiscent of his first album. It seems like this song is on its way to being huge on the radio, because Kanye took the word “ship” out of Ne-Yo’s verse. It sounded too much like the word… well one of the words you can’t say on the radio.