Lady GaGa magazine covers were the top sellers in 2010!  According to a study by WWDMedia, magazines featuring Lady GaGa on their covers easily beat out sales of those featuring Taylor Swift and Rihanna.  Gaga was busy in 2010, posing for Rolling Stone, Vanity Fair, Elle and Cosmopolitan.  Each issue she graced the cover of racked up huge numbers.  Her famed Rolling Stone cover, for which she wielded two automatic weapons in a thong, was the top-selling issue of the magazine last year.  The rest did nearly as well: Gaga scored the second-bestselling issue of Vanity Fair, the third best for Elle and was the top seller through October for Cosmopolitan.