We already know that David Cook can sing, but did you also know the American Idol contestant can act?

Oh, wait, that's Chace Crawford (below, left), isn't it? Forgive us for confusing the Idol finalist with the Gossip Girl star, but you can see why it's easy to make such a mistake, can't you?

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.