NEW VIDEO: Lady Gaga Riles Up Little Monsters at L.A. Concert

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Lady Gaga celebrated her 25th birthday in style at the Staples Center in Los Angeles Monday night, delivering one of her many empowering speeches before belting out "Born This Way." Watch the video!

Surrounded by a packed arena crowd of her dedicated Little Monsters, Gaga did not disappoint with a parade of outlandish costumes, from a body suit and knee-high boots to a giant red cloak and a see-through nun-inspired costume.