Viral Video: 50 Cent Joins Teenager in Rap

Fifteen-year-old Keenan Cahill is already known with over 30 million YouTube plays for some of his lip syncing parodies of Michael Jackson and Justin Bieber.  Now he's now caught the attention of rapper 50 Cent who joins the teen in his latest YouTube video "Down on Me," which has over 3 million hits.  Check out the video below (please note explicit lyrics):