Late Night With Jimmy Fallon

Florence Welch helps Jimmy Fallon belt out 'Balls in Your Mouth'

Sep. 13, 2012 at 2:21 PM ET

While they're currently trekking across the U.S., Florence and the Machine swung by "Late Night With Jimmy Fallon" last night for a very special performance.

The band performed "Spectrum (Say My Name)" to close out the show, but the real highlight came earlier, when Florence Welch joined Fallon for a rousing rendition of "Balls in Your Mouth" -- the protest song he wrote in 2010 about the tar balls washing up on the shore following the BP oil spill.

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As Hurricane Isaac has caused old tar balls to reach shores again, it was an apt opportunity to bring back the track, and Welch gave the song's earworm of a refrain -- "Balls in your mouth / Balls in your mouth / Don't swim in the ocean / You'll get balls in your mouth" -- a full diva makeover. The studio audience and the Roots made sure to get in on the fun, too.

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