Scorsese always has greats choices for songs in his movies, but he really surprised everyone by putting Nas' "Thief's Theme" in his Oscar-winning film, The Departed. Who knew Marty was into rap? It made sense, though. If we were doing business with some smartass Puerto Ricans we'd bump Nas in the whip to stay on edge, too.
We can't be sure, but we always took the placement of the song as a possible thank you note from Scorese to Nasir after Nas paid homage to Casino in his music video for "Street Dreams."