Today's the day that Kanye West's 'Graduation' faces off against 50 Cent's 'Curtis.' The publicity-savvy pair feuded in a war of words, with Fiddy claiming he'd retire if West sold more albums. They appeared head-to-head on the cover of Rolling Stone. They even squared off in person at the now-infamous 2007 VMAs. Now the decision lies in the hands of hip-hop fans worldwide.