Jimmy Fallon featuring Florence Welch - Balls In Your Mouth (Live on Fallon)

U.S. talk show host Jimmy Fallon wrote a protest song back in 2010 about the catastrophic British Petroleum Gulf of Mexico oil spill titled “Balls In Your Mouth” in reference to old tar balls that were washing up on the Gulf Coast. The recent Hurricane Isaac had caused more of the same tar balls to wash up on U.S./Mexican shores again, and a viewer wrote into the Late Night with Jimmy Fallon show to request that Fallon sing the song again. The host indeed obliged but this time was joined by British singer Florence Welch of Florence + the Machine to sing the latter half of the song. Watch the clip above to listen to her version of the track.