This year’s cover albums offered ambition on a scale we’ve never seen before. Moving beyond the normal “cover a bunch of random songs we like” tossoff, 2012 offered deeply thought-out conceptual collections. One updated kiddie folk songs for raved-out rockers, others reworked complete albums to their own ends. Even the all-star tributes that pop up every year aimed higher – one of the year’s most high-profile had 70+ tracks! So today we count down the best of the bunch, the ones that swung for the fences and got there. With every passing year there seems to be less sigma attached to the phrase “cover album,” and these sets move that needle even farther forward.