12. John Travolta and Olivia Newton-John, This Christmas - As if they deliberately intended to destroy any fond memory we had of Grease, Danny and Sandy made their long-awaited reunion on a wan album of overproduced holiday chestnuts, heralded by a cover designed to make grown men believe not in Santa but the bogeyman. Olivia looks fine, really, but after we've seen what most people would suspect is Travolta's real hairline in Savages, why he thinks he looks cool as a Christmas Chia Pet defies imagination. More hot chocolate, kids?
Album art is shrinking, from the LPs we once fondled to the tiny digital covers we now squint to comprehend. But they'll never be too small to bring out the worst in musicians and their art directors, as cover art always has. Nothing in 2012 could quite compare with the horror that was Lady Gaga's Born This Way album artwork in '11. But a lot of artists made their best/worst attempts to uglify their covers, from Ke$ha to Carrie Underwood to the Killers. Here are a dozen of the year's weirdest or most wretched album sleeves.