I once bought a cd by a band called UFO! (probably the shittiest, most annoying thing I've ever listened to) because I thought it was UFO.
Also - Cake (the one that had that song "Short Skirt, Long Jacket", and Long Beach Cake, later the Lungpigs.
Incubus (3 bands)
Then there is a band called Karp, and two bands called Carp,
one of which is my favorite local band.