Well there's the old saying that there's no such thing as bad publicity
Let's face it, parodies are quite often done by cult shows, in some cases on prime time.
Look at Saturday Night Live?
It was FAMOUS for parodies.
John Belushi might have taken the mickey out of Joe Cocker in one famous skit, but it had thousands of viewers at prime time thinking "Joe Cocker".
People could hear one of these parodies, and afterwards imediatly satart unconciously humming Paradise to themselves.
It's all about getting the artist on a persons mind.