OK, I'm a sucker for these kinds of games. Brings back memories of "Mad Libs" and road trip games...
Try writing your own, and I'll post some ideas next time!
Heavy Metal= Medieval Weapon + President Name
Death Metal= Nickname + Internal Body Part
Alt/Indie Rock= an element + (part of) classic book title
Country= City + Pet's Name
HipHop= famous landmark + garden tool
Boy Band= mode of transportation + flower name