News: 50 Cent promises to Quit

50 Cent believes his new album will outsell Kanye West's upcoming disc, and he's betting his solo career on it.

Both 50 Cent and West have albums due out September 11. 50 Cent, who has sold better than West, has been riled by forecasts that sales of West's Graduation could rival those for his Curtis CD.

"Let's raise the stakes," the 31-year-old rapper told hip-hop website SOHH.com in an interview posted Friday. "If Kanye West sells more records than 50 Cent on September 11, I'll no longer write music. I'll write music and work with my other artistes, but I won't put out anymore solo albums."

An email sent to West's publicist was not immediately returned Friday.

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