Last night Fun. appeared on the Colbert Report to help Stephen Colbert kick off his awesomely named festival StePhest Colbchella '012: Rocktaugustfest! with a performance of their massive hit "We Are Young" at New York City's Intrepid Sea, Air and Space museum. You can also check out Colbert's interview with Fun., and stay tuned for more music this week with Santigold, the Flaming Lips and Grizzly Bear all set to appear as well.