The best coves are all better than the original. Off the top of my head I can think of Hendrix's "All Along the Watchtower", George Thorogood's "Who Do You Love?", Dave Matthews Band feat. Warren Hayes' "Cortez the Killer", Led Zeppelin's "Babe I'm Gonna Leave You", Sinead O'Connor's "Nothing Compares 2 U", Jeff Buckley's "Hallelujah", and Johnny Cash and Joe Strummer's "Redemption Song".
Also, don't be an idiot, Drummer. Only half of Wham! was gay. Ignorant prick.