April 9, 2014 | 8:38am ET
Last night, CoSigned UK trio London Grammar stopped by the Late Show with David Letterman to perform “Strong”, off their debut album If You Wait. Catch the replay below.
London Grammar are amidst an extensive world tour, which includes appearances at Bonnaroo, Lollapalooza, and Glastonbury. Check out their full tour docket here. And make sure to read our CoSign feature on the band here.
(Check out our list of 10 Replacements for David Letterman)
