I think Nas must be a big fan of Mob movies/TV shows. In his latest song (w/ J. Lo) he talks about the movie Casino and in one of his videos he acts out one of the scene where DeNiro and Pesci are covering their mouths while talking to avoid government hired lip readers.

Also I don't know if any of you watch MTV Cribs, but every rap star/pro athlete seems to insist on mentioning that they have the movie Scarface on DVD.