Carey had a hit with "All I Want For Christmas Is You." There's a sign in a Dallas bar the warns: her song will be skipped if played before Dec. 1. After that, it is only allowed one time a night.
NPR's Ari Shapiro talks with Rodney Carmichael, who is the host of the NPR series The Formula. The show looks at the collaborative relationship between hip-hip artists and their producers.