If you've at all followed the career trajectory of noise-pop duo Sleigh Bells, you already know that a live performance by singer Alexis Krauss and guitarist Derek Miller can feel like a blow to the head in the most appealing way possible. And if you've heard any of Sleigh Bells' sweet-then-salty, loud-and-then-LOUDER songs on their first full-length album Treats, you know the tunes deserve -- make that DEMAND -- a performance of EPIC proportions. (We here at MTV found this out when we gave Sleigh Bells their very own Live In NYC show at Webster Hall.)

And that's precisely what they gave us at the 2011 mtvU Woodie Awards, a performance of epic proportions that only managed to get more epic. As if we weren't already scratching our heads over how just two people can make such a great big painfully pleasant noise, Sleigh Bells was joined on stage by the thunderous (and seriously sexy) sounds of Prairie View A&M's "Marching Storm," which launched their already out-of-this-world track "Riot Rhythm" into a whole new stratosphere of rock.

+ Watch Sleigh Bells' mtvU Woodie Awards performance of "Riot Rhythm."