The song is from a live concert, so you can't hear the sound all the great, but listen to how emotional Justin gets. He sounds like he crying at some parts. Especially the end. Justin sings the entire song. Oh, and in concert Justin crawls all over the stage. And then he lays down and starts thrusting in the air, on the cat walk thing. It's a slow song, but thrusts are nice any time. lol =)