There’s hardly any band in the world with members under the age of 35 that hasn’t done a Coldplay impression at least once, and now it’s Mumford & Sons’ turn. They’ve stressed that their new album, out in May, will be a drastic departure from their folk days, and they weren’t kidding. With their new single, “Believe,†Marcus Mumford has the whole nasally Chris Martin thing down. It sounds especially influenced by A Sky Full of Stars–era Coldplay.