Alice741

I am looking for a way to find songs that are used in multiple movies. This is for doing a list of songs in a 6 degrees of separation method. A song 1 is used in movie A and movie B. Song 2 is used in movie B and movie C and so on finally getting back to the last move that uses song 1 to complete the ring. Is there somewhere that cross references songs and movies this way? Any help is greatly appreciated!