What happens when a "recovering Catholic" talks about Catholicism with a practicing Catholic?

Comedian Stephen Colbert, host of "The Colbert Report," talked with actress and best-selling author Jenny McCarthy today on " Good Morning America" about her new book, "Bad Habits: Confessions of a Recovering Catholic," and asked her about her decision to leave the Catholic Church.

"The [book's] subtitle is 'Confessions of a Recovering Catholic,' so do you still go to mass?" Colbert asked.

"I don't still go to mass, but I do still believe in a lot of things that Catholics do such as Jesus, Mary and God, things like that," McCarthy, 39, said on "GMA."

"You know you're going to hell, right? Listen. I'm just saying," said Colbert, who was guest co-hosting "GMA" today. "There is only one true bride of Christ and it is the Catholic Church. I don't mean to bring you down at the end of what was a lovely segment."

McCarthy laughed and rebounded quickly, turning on her naughty school girl charm: "Why don't we break some commandments together? I could teach you," she told Colbert.

"I covet your book sales," he said.

McCarthy's new book, "Bad Habits," chronicles her devout Catholic upbringing in a polish neighborhood on Chicago's south side and transition from a school girl with aspirations of becoming a nun to the 1994 Playboy Playmate of the Year.

"I stole out of the money basket," McCarthy confessed today on "GMA." "I had to take off the habit and put on the push up bra."