I think this one pretty much tops them all. Then again, you might disagree: Geico/Buttersworth What's yours? ~String
I didn't get it but maybe it's because i'm delirious with flu. Here's one of mine favourites http://www.youtube.com/watch?v=nojWJ6-XmeQ
http://www.youtube.com/watch?v=eJqnitjqpuM It not cause its a talking baby, its cuz I agree with what he says about the clown. And string, that was HILARIOUS!!!!