This is the whole version of LA Song, as sung on the Angel episode, Dead End. The clip of him singing in the show is also posted in the CK spot by Sparkie.
A music video on YouTube, created by WiccaJaz. This video features Christian's character, Lindsey, set to the song Rattlesnake Smile, and the singer is incredibly obvious. One of meh fav songs, too. ^.^