From The Sound of Commerce: Marketing Popular Film Music, by Jeff Smith:
[T]hrough their ownership of publishing and record ventures, film companies also derive additional monies from their control of various copyrighted materials.... [T]hese revenues come from two sources--synchronization licenses and master licenses. The synchronization license is negotiated with the publishers of a particular song, and this entitles the licensee to use the notes and lyrics to a particular piece of music. The master use license, on the other hand, is negotiated with a record company, and it enables licensees to use a particular recording. To use "Bohemian Rhapsody" in Wayne's World, filmmakers paid both kinds of licensing fees, one to the song publisher and one to Queen's record company. To license the song "Mickey" in the same film, however, producers paid only a synchronization fee since they used just the song rather than Toni Basil's recording of it. ("Mickey" is briefly sung by Wayne and Cassandra as they ride in his car.)
Teacher says: Everytime you hear James Brown sing "I feel good" in a trailer, Fort Knox Music hears a cash register ring.