Sharon leaves America's Got Talent? (From Somerset County Gazette)

Sharon leaves America's Got Talent?

10:20am Wednesday 25th July 2012 in National Entertainment News © Press Association 2013

Sharon Osbourne has said that she is ready to say goodbye to US TV show America's Got Talent, taking television network NBC by surprise.

In a post on Twitter, Sharon addressed "my darling" fellow judge Howard Stern and said "money is not the reason I'm not returning" to the show. Her tweet trailed off with "it's because..." and didn't elaborate.

Sharon's message was unexpected, NBC Entertainment Chairman Robert Greenblatt told a meeting of the Television Critics Association.

"This is coming out of context and sort of spontaneously, and we don't even know what's going on. And it's probably much ado about nothing," Greenblatt said, declining to comment further.

Sharon has a multi-year contract with the series, said a person familiar with the production.

America's Got Talent, which is now airing its seventh season, added Howard to the judges' panel this year and moved the production from Los Angeles to New York to accommodate him. Howie Mandel is the show's third judge.

Sharon's representative did not immediately respond to a request for comment.

The tweet from the star, co-host of The Talk and wife of rocker Ozzy Osbourne, appeared to refer to one posted on Monday on the account for Howard's radio show.

Howard "isn't sure if he'll do another season and says Sharon Osbourne may not come back unless she gets more money," the tweet read.

Asked whether Howard intended to stay with the show, Don Buchwald, his agent, responded by email saying "we do not respond to inquiries of this sort".