When Talk Show Guests Go Hilariously Rogue: Joy Behar Embarrasses Jay Leno!

Behar was the guest on Leno's Tonight Show but she totally, hilariously turned the tables on the host!

Have you heard that Sharon Osbourne had a long-ago fling with Jay Leno? Osbourne recently revealed that information on The Talk, but Leno refused to comment -- until Tonight Show guest Joy Behar confronted him on live TV. Watch below!

Usually, talk show hosts and guests decide on their conversations in advance, but Behar appeared to go off-script as she held up a newspaper she "just found in the make-up room."

"You brought this one with you!" Leno protested, as Behar held up an article about his affair with Osbourne.

"Sharon Osbourne said the comic was a good kisser, but she doesn't remember the sex," Behar read out loud, raising her eyebrows. As fellow guest Christina Aguilera looked on, Behar grilled Leno about one particular Osbourne quote: "There's a reason God gives people those chins, and I found out the reason."

"Christina and I would like to know what that means -- that you give good chin or what?" Behar said.

"I have no idea," Leno muttered, trying to change the subject. "Good night, everybody! Jimmy Fallon will be here tomorrow night."

Hmm... we wonder if Leno's imminent departure from The Tonight Show (he'll be replaced by Fallon next year) gave Behar the courage to pull a fast one on him. Either way, it was totally worth it. Leno stuttered an explanation, saying that "when we were both single," Osbourne became a fan of his comedy and began anonymously calling him, every night at midnight, for weeks. Eventually, he asked to get together.

"And then you had sex with her?" Behar asked.

"People go out," Leno replied -- which is not unsimilar to what Osbourne said when Julie Chen asked the same question. You can watch Sharon disclose her "flingy-wingy" on The Talk, below. (And in case you're wondering, Leno looked like this in the '70s.)

The best part of the Leno segment isn't learning more about the Sharon-Jay affair (which we're actually kind of uncomfortable picturing); it's watching Behar gleefully pull the rug out from under Leno. We miss her on The View. But here are a few other similarly entertaining clips, where talk show hosts were thrown for a loop by their own guests.

This past June, Russell Brand got fed-up with the silly questions from MSNBC's Morning Joe hosts, and proceeded to start doing the news:

Back in her wild-child days of 1995, Drew Barrymore did what nobody could have expected: She flashed David Letterman:

Surprises are a big part of Ellen DeGeneres' schtick, but every once in a while, a celebrity turns the tables. A pregnant Pink showed up on Ellen in 2011 with a surprise birthday serenade:

Stephen Colbert's childhood crush Jane Fonda came on his show in 2007 and decided to put the moves on him. Awkward hilarity ensued.

This is a fun one: Mary Tyler Moore literally rendered Oprah Winfrey speechless with a surprise appearance on her show in 1997.

Donna Kaufman is a freelance writer and iVillage contributor. Find her on Twitter and Google+

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