Malia Obama is having a blast at the Lollapalooza Festival in Chicago! The eldest first daughter was spotted shaking it off on stage during one hip-hop set on July 29, and we still can’t get over it! See Malia party hard here! Who knew Malia, 18, had a wild side! Festival video footage showed the Harvard-bound student and a few of her friends grinding on stage and getting down with rapper, Mac Miller, 24, according to TMZ. She clearly was having a great time. And Malia stopped briefly to enjoy an inside joke with her girlfriends before she jumped right...