Lady GaGa, ‘Little Monsters’ and a Night of Hits in St. Paul [VIDEO] [PICTURES]Lady GaGa, ‘Little Monsters’ and a Night of Hits in St. Paul [VIDEO] [PICTURES]I didn't know if it was Halloween or artRave: The ArtPop Ball last night (Tuesday) at the Xcel Energy Center in St. Paul, Minnesota. Chad TaylorChad Taylor