Britney Spears was shocked and horrified when a crazed fan rushed the stage of her Las Vegas performance last night, RadarOnline.com can reveal.\n\nAccording to audience videos, a man crashed Spears and her dancers’ rendition of her appropriately titled tune “Crazy,” doing a flip of his own before a security guard or dancer tacked him to the ground.\n\nhttps://www.facebook.com/britneyturkiye/videos/10159132226135481/After asking fans if they were having fun, the “Toxic” singer, 35, quickly became aware of the chaos behind her.\n\n“Is something okay? What’s going on?!” she asked as a guard attempted to calm her down. “What’s wrong? What’s wrong?”\n\nFans cheered in support, and called the disruptor an “a**hole.”Fortunately, Spears and her dancers appeared unhurt.\n\nAs Radar exclusively reported, she will end her long-running residency later this year to focus on her family and boyfriend Sam Asghari, 23.We pay for juicy info! Do you have a story for RadarOnline.com? Email us at email@example.com, or call us at (866) ON-RADAR (667-2327) any time, day or night.