But sometimes celebrities aren't content to cheer quietly from the sidelines. Take, for example, Lady Gaga at last night's Mets game. First she showed up in a bikini with a leather jacket over it—we assume she only grabbed the jacket because it was raining. Then Gaga got annoyed at all the attention she was getting, so she started flipping the bird to fans. Way to show off your sportsmanship, Lady.
Here are other celebs being conspicuous at sporting events.