Kelly Osbourne injured her ankle when she fell over on the set of America's Got Talent.

The Fashion Police star was visiting her mother Sharon, who was shooting the NBC talent search show, when she tripped and fell in front of a huge studio audience and was left embarrassed with a swollen ankle. "I tripped on the stage like a dumb ass while visiting my Mumma at #AGT. I have the worst luck it had to be In front of the whole audience!!! I have a golf ball on my ankle! (sic)" she wrote on Twitter.

It was one of Kelly's last chances to visit her mother on the set of the program after Sharon recently quit the series and declared war on its network NBC, claiming they discriminated against her son Jack by axing him from reality show Stars Earn Stripes, allegedly because of his multiple sclerosis (MS) diagnosis.

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