POTW: Alicia Keys, Swizz Beatz, Katy Perry, Chris Brown
50 Cent got dressed up for the 2010 NYILFF premiere of his new movie, "Gun" in NYC on Jul. 30.

50 Cent earned $8.7 million in paper money on Monday, thanks to some tweets, the New York Post reported.

The singer helped pop the shares of the penny stock of H&H Imports, in which he has a stake, by talking it up on Twitter over the weekend.

"You can double your money right now. Just get what you can afford," he tweeted. H&H owns a marketing firm called TV Goods that was founded by Kevin Harrington of ABC reality show "Shark Tank" fame. 50 later added: "Check out TVGoods.com official site of Kevin Harrington."

H&H stock gained 29 cents to 39 cents on Monday. That helped boost the value of the singer's stake by $8.7 million, according to Post reports.

50 Cent, aka Curtis Jackson, reportedly received 30 million shares of H&H in a private placement last October. In March, the firm's auditor raised questions about its ability "to continue as a going concern."

(Additional reporting by Jillian Mapes, Billboard)