Break out the party hats and piñatas -- it's Ellen's birthday today! We're celebrating by turning today's show into one giant surprise party! Some of the biggest celebrities are stopping by to celebrate -- and Ellen has absolutely no idea who they'll be! She does know that one of her favorite bands, ONE ESKIMO, will perform whatever song she chooses. And of course, it's not Ellen's birthday without lots of gifts -- not for her, but for the entire audience!