Watch Mumford and Sons play “I Will Wait” on the Late Show with David Letterman (playing two sold-out shows at SBC in February)

Explosive UK folk-rock favorites Mumford and Sons appeared on the Late Show With David Letterman last night, performing the single “I Will Wait” from their 2012 album Babel. Watch the video below. The band returns to the Philadelphia area this winter for two sold-out shows at the Susquehanna Bank Center on February 16 and 17.