Before the The Hunger Games controversy and Washington Capitals' Joel Ward fiasco blew up on Twitter, celebs were already causing a fracas on the microblogging service, spewing racist and obscene tweets. Rappers like Asher Roth took a hit for making a Don Imus-like comment on his page. Rihanna recently caught flack for posting a racially ambiguous tweet aimed at her ex's new Vietnamese girlfriend. Even film critic Roger Ebert was condemned by fans and haters alike for tweeting disrespectful remarks in regards to the N-word. And those are just a few of the incidents. Keep reading for more shockingly racist celebrity tweets.