Rapper 50 Cent made $8.7 million yesterday -- by tweeting.

The 35-year-old celeb, aka Curtis Jackson, helped pop the shares of a no-name penny stock company he's invested in by 290 percent yesterday after chatting it up this weekend on Twitter, the social-networking site.

www.nypost.com/p/news/business/cent_millions_y5r6uquXPHX43R2NCWX6MN