Last night, Syracuse Barsuk troupe Ra Ra Riot brought their meaningful-core to Letterman, performing the poppy but emotional "Can You Tell." There's much smiling and mugging between band members, but frontman Wes Miles knows just when to get that faraway look in his eyes (see accompanying screen grab). It's a more relaxed, assured outing than their performance of the also sweetly melancholy "Ghost Under Rocks" on Conan early last month. Also, we learn two important things: Letterman audiences love Syracuse and Dave has never seen a cello before this performance.