#18 – Gnarls Barkley – “Crazy” – (2006)

This is another one of those songs that many people would’ve put at #1 on this list. I think it’s near-amazing, but not quite and I was never a fan of it when it came out. Cee Lo Green (the vocalist here and half of Gnarls Barkley) has gone on to be much more famous outside this song but this is what put him on most people’s maps (he was in Goodie Mob back in the 90s). It hit #2 in the U.S. and has appeared everywhere and won a Grammy. This is easily one of the biggest songs of the decade by arguably a one-hit wonder.