By Isabella Biedenharn
Updated April 27, 2015 at 09:29 PM EDT
Matt Erwin

You might assume that songwriters who are established artists in their own right would keep their best work for themselves. But as history tells us (see: Otis Redding writing for Aretha Franklin, or Prince writing for … everyone), superstars can be surprisingly generous (and/or enterprising). Can you match these musicians with the hits they co-wrote for the competition?