I think I just became a Justin Timberlake fan...

I don't own a single Justin Timberlake CD and the only song of his that I can even name is "Sexyback." I know he used to be in NSYNC, was once a mousketeer, and has dated Britney Spears, Cameron Diaz and now Jessica Biel. What I didn't know was how completely buff he is! Here, Justin shows off his terrific physique over the weekend at a concert in Sacramento.