Jenny McCarthy knows that a relationship is over when the laughs stop. The former model explained why she ended things with her ex-boyfriend Jim Carrey on The Oprah Winfrey Show. The couple, who started dating in 2007, went their separate ways in April, announcing the breakup on Twitter.

McCarthy, 37, opened up about the reason for the split. Oprah went for the kill, asking, "Tell me, when did you know it was over?" McCarthy was equally frank in her response. "You know, the simple word I can give – and there's a few, so let me say a few. The first thing is, when it's not fun anymore, you need to start investigating and do an inquiry into the relationship."

She seemed surprised, however, when Oprah asked her if she thought she would get back together with the comedian. "God, another good question," McCarthy said. "That's sort of a simple one," Oprah responded. McCarthy, thrown for a loop said, "I know. I didn't even think about that one, though." –AMY LEE

Read more about: