Katy Perry closed out the 2013 MTV Video Music Awards with her new hit single, 'Roar,' from under the Brooklyn Bridge ... and she was a true knockout.

Perry rocked boxing-themed garb and performed in a stage designed to look like a ring. There were some issues with her vocals, which were at times inaudible, but that may be due to the outdoor venue and audio issues with production more than Perry's pipes. Perry's punchy performance delighted the DUMBO crowd, and the 'Game Over' banner she held up at the end may have been a message: It's game over for the show and for the charts, because she's the champ!

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