LOL! If you read the comments on the actual Youtube page you'll see that cameras weren't allowed during this (Jimmy Kimmel Live ) and right at the 1:11 mark you see David see the camera and the look he gives is freaking adorable. It's like "Mmhmm... what do you think you're doing, you sly little fox?" It is so cute. Then he keeps looking at it so they get these killer shots. He's awesome.
And... David kicks ass on this song!