Some drama went down after Monday night's Costume Institute Gala involving Kiefer Sutherland, Brooke Shields, and so-hot-right-now designer Jack McCollough of Proenza Schouler. The details are still a bit iffy, but the gist of the story is that Kiefer headbutted Jack, which sent the designer to the hospital. According to Kiefer's side of things, Jack knocked Brooke over at an afterparty, which caused the altercation. Other rumors say that Brooke was in an argument with Jack, and when Kiefer demanded he apologize, Jack refused, which caused it to get violent. Brooke's rep, on the other hand, says that McCollough did nothing wrong. Unfortunately, stories of Kiefer's behavior earlier in the night don't necessarily help the credibility of the actor, who is still on probation from his DUI. The whole thing sounds a bit fishy, but we'll see how it unfolds as more and more details emerge.