I Shot the Sheriff -covered by Clapton, originally by Bob Marley
Ruby -covered by The Killers, originally by Kenny Rodgers
I Will Survive -covered by Cake, originally by Gloria Gaynor
Cocaine, After Midnight, Call Me the Breeze -covered by Clapton, Lynyrd Skynyrd, originally by JJ Cale
Mony Mony -covered by Billy Idol, originally by Tommy James and The Shondells
I can't believe that anyone mentioned this one:
With a Little Help from My Friends -covered by Joe Cocker, originally by The Beatles.
That is all I can think of right now, I will have to listen to the iTunes Library to see if I have any more.