Tying for 20th place with 60 covers each is "Get Off of My Cloud," a 1965 single, and "No Expectations" from 1968's Beggars ...

Rock and roll is capable of being a genre of great excess, but these cover songs are ridiculously over the top.

Many of classic rock's greatest artists have found a way ... thrilling or thought provoking, all of the ghost songs below have one thing in common -- they remained hauntingly memorable long ...

Flip through the slideshow for 20 of music's most unique voices. From rock icon Freddie Mercury to pop queen Miley Cyrus, these artists have a sound that is uniquely their own.