The clean version of rapper 50 Cent's "Curtis" (Aftermath/Interscope) landed online today, the same day the clean version of Kanye West's upcoming "Graduation," (Roc-A-Fella Records/Def Jam) was leaked on the Web as well. Both albums are scheduled to hit stores Sept. 11.

The head-to-head release date has been the center of a media storm over the past few weeks and 50 Cent has vowed to retire if West outsells him on first week sales.

West sold 860,000 units the first week with his 2005 album, "Late Registration," while 50 Cent sold 1,141,000 copies of "The Massacre," according to Nielsen SoundScan.