Self Esteem covered by Culture Serial Killers. It is called a reggaecover.

http://open.spotify.com/track/6Ly0hinJpH6URwsU4f8KKP
http://www.youtube.com/watch?v=UC479sYvKdY

They have done a cover of Green Day's Basket Case aswell.

http://open.spotify.com/track/2kDBQDdyuE2if9inUr99sP
http://www.youtube.com/watch?v=6uKXBYFFrFw

Hopefully not a repost. Google did not find it. http://www.google.com/#q=site%3Aoffs...ial+Killers%22