But Perry ignored the safety advice and stormed straight to the center of the dancefloor, grabbed a mic and started singing Beyonce Knowles' hit "Single Ladies (Put a Ring on It)" - before the shocked DJ started spinning her recent hit "California Gurls". In a post on her Twitter.com page, she wrote, "I totes (totally) just crashed a prom!" http://foreign.peacefmonline.com/ent...1008/70821.php
