Released in 1990, Crazy by Seal (playlist) is an awesome song. Being the middle sister of our Crazy trio, it may not get the recognition of the other Crazys and indeed Alanis Morissette is the only big name to cover it but it has some great covers with a diversity of styles.
Alanis Morissette (playlist) great version
Yeasayer (playlist) adds a touch of folk
Helena Paparizou (playlist)
Talisman (playlist) sweet metal version
Cheap Robot not quite sure if they were going for hip or haunting but I like it
Mushroomhead (playlist) give us another nice metal version
ROX (playlist) does a very beautiful slow version
Jeff Scott Soto (playlist) strong acoustic version
Panic Cell (playlist) Lego's rock so does this version
Original Crazy video by Seal.