Rapper Asher Roth has joined Russell Simmons' newly-launched digital venture, All Def Music, an imprint that will sign, promote and develop YouTube artists.
After finding widespread success with his 2009 single, 'College,' Asher Roth seemingly dropped from the music scene as he took a brief hiatus. Now he's back with 'The Greenhouse Effect Vol. 2,' returning with the same formula that helped him find success with his 2008 mixtape, 'The Greenhouse Effect.