Mumford & Sons are back, and they didn't waste a single second before whipping out their bleedingly earnest brand of smile-making folk, complete with rollicking guitars and twangy banjos. In "I Will Wait," the lead single (and first song) off the group's second record, Babel, the English foursome sing in honeyed harmonies, crescendoing into an archetypically Mumfordian finish of emotional fireworks and bombast. This should tide you over until Babel arrives on September 24. Right? Right?! Tell us below.