Sharon Osbourne & Piers Morgan Fall Out on America's Got Talent  5/1/07

Things aren't going well behind the scenes on Simon Cowell's US TV show America's Got Talent - because British judges Sharon Osbourne and Piers Morgan can't get along.

Cowell admits he invited his pal from British talent show The X Factor to replace embattled RnB star Brandy for the second series of his hit reality TV contest because he knew she'd happily tackle the outspoken tabloid journalist.

Cowell says, "He is actually very annoying and somebody has to tell him that."

And Morgan reveals, "She keeps walking off the set in fury, calling me disgusting."