You never know what’s going to happen when musicians get together in the recording studio. Sometimes the most unlikely collaborators end up making sweet music together, while surefire pairings end up falling flat. Snakkle takes a look at some of the most interesting, entertaining, and just plain unfortunate musical mashups in recent pop history.

We know three things about the ’90s: Michael Bolton was its quintessential singer, the mullet (business in front, party in back) was its quintessential haircut, and one man had the quintessential mullet—you guessed it, Michael Bolton! So as a gift to him for his 61st birthday, we present: The Best ’90s Music Mullets.