I am looking into filming next summer and in my script I based an entire scene off of a song. The song is by a famous rapper and I was just wondering, would I be able to use music like you hear on the radio in my film? Or would I have to go through all kinds off legal things and what not to get the ok to use it? Also would I be able to use a score from another movie? It would only be one part and the rest I am scoring myself. It is an indie film so my budget is very low.