Check out the MTV world premiere of Panic! At The Disco's "Ballad of Mona Lisa" now on www.MTV.com.
Specifically, it's at http://www.mtv.com/videos/panic-at-the-disco/619867/the-ballad-of-mona-lisa.jhtml#id=1518071
By the way, I thought they had ditched the exclamation point in their name, but it appears to be back. What gives?