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Lady Gaga spotted in London on September 8 and 9, 2012 -- Getty Premium

Lady Gaga

Singer Lady Gaga, real name Stefani Germanotta, is busy promoting

her upcoming fourth studio album "ARTPOP" and stirring up some trouble.  A political ally of Russian President Vladimir Putin is taking legal action against American pop star Lady Gaga for promoting gay rights to minors during a concert on Dec. 9.