Viral Date: January 2006

Britney's baby daddy's rap career was already D.O.A., but his in-studio preview of the first single was a huge shovel of dirt on the coffin. Watching K-Fed enthusiastically lip-sync, hand-clap, and gyrate to his amazingly asinine "Brazilian ass shaker" almost makes his existence worthwhile. Almost.

"Popo Zao" didn't' even make the final cut of K-Fed's 2006 debut album, which made it to #151 on the Billboard 200 chart.