Sharon Osbourne Says She's Leaving 'America's Got Talent'

While she was all smiles on the NBC reality show Tuesday night, Sharon Osbourne let slip a bombshell before the show taped: she's apparently quitting "America's Got Talent."

In a tweet to co-judge Howard Stern, Osbourne posted, "My darling @HowardStern, money is not the reason I'm not returning to @nbcagt, it's becauseā€¦" and left it at that, without elaborating.

With that said, Osbourne made no mention of her tweet on the show, but posted to her Twitter feed throughout the live show regarding the performances.