"The Celebrity Apprentice": Debbie Gibson takes us behind the scenes

(SPOILER ALERT) (CBS News) "The Celebrity Apprentice" said goodbye to another contestant Sunday night, when Donald Trump booted comedian and magician Penn Jillette from the boardroom. That leaves six contenders left to battle for the $250,000 bonus check for charity.

Debbie Gibson, who ended her seven-week run on the series earlier this month, knows how the rest of the "Celebrity Apprentice" season shakes out. Although she's not dishing, she did give CBSNews.com some behind-the-scenes details on all things "Celebrity Apprentice."

First things first. Who's business-savvy enough to win?

Pictures: "The Celebrity Apprentice"
Read more: Contestant pulls a disappearing act

"I can step back without letting on to what happens that --- day one I said, 'I can see Clay [Aiken], Lisa [Lampanelli], Arsenio [Hall] and Dee [Snider] in the final four," Gibson told CBSNews.com. "Obviously I was wrong about Dee. I can't tell you about the others. But even where I sit now as a viewer, I would see Lisa up there, Clay up there."

One thing's for sure, though. The "Shake Your Love" singer is sleeping a lot better ever since getting kicked off the show.

"When I signed on I said, 'Sure I want to win, but only if it means I can go to sleep at night,'" Gibson said."If there ever comes a point in that time where I get a knot in my stomach, where I feel like 'OK, we're ambitious' to 'No, we're being shrewd' -- and there's a difference -- then it's time to go,'" said Gibson, who was fired on the April 7 episode. "And that's exactly what started happening. People were ganging up on one person without warrant. I didn't feel right about going there and joining the bandwagon."

Looking back, though, the 41-year-old singer says she's proud of how she handled herself on the series; she wouldn't take anything back. Still, Gibson admits she didn't always like "every single color" she saw of herself.

"I think anyone who has a camera on themselves 20 hours a day and would watch back snippets wouldn't always like what they saw," Gibson said. "But I do stand by every decision I made."

Asked whether "The Celebrity Apprentice" is edited fairly, Gibson said, "The show is actually edited pretty true to form, but there's only a certain amount of story lines they can show."

Gibson said she spent many hours doing manual labor, but that was rarely shown.

"Every storyline of mine that was cut through the entire run was me on my hands and knees scrubbing floors, was me running down the street, sweating, lugging furniture, props things," she said. "And for some reason they did not show me in that light."

As for Donald Trump, Gibson has nothing but positive things to say about the business mogul, whom she's known for a long time. He was at her Broadway debut of "Les Miserables" 20 years ago.

"I really like Donald Trump because he's respectful," Gibson said. "He's not afraid of what people think. He says what he thinks and what he feels. And he stands by it. I also think he gets his persona and he stands by it and he uses it in business.

Gibson still stays in touch with some of her fellow contenders, including actress-model Patricia Velasquez and former Miss Universe Dayana Mendoza. She's also friendly with Hall and Lampanelli. Just last week, she performed at Snider's Jam For Autism benefit show in her native Long Island.

And despite their on-camera disagreements, Gibson is still in touch with pop singer Aubrey O'Day.

"A lot of my friends are like, 'How can you like Aubrey?' "I think she is somebody who is very sharp, very smart and I look at how she's grown up in the reality world," Gibson said. "And now having a taste of the reality world -- it's very confusing. You have cameras on you. You kind of forget they're there, but not really. So you're kind of playing this heightened version of yourself all the time."

Gibson walked away from the show learning a thing or two about herself. A life lesson, if you will.

"I used to be a people pleaser," Gibson said. "It was like, 'Oh, everybody like me.'"

She added, "You can't always be liked if you're the boss in a situation ... if you have a strong opinion, or just in general, you can't always be liked. You're not going to get along with everybody. I walked away from this going, 'And that's OK.'"

For more, watch CBSNews.com's interview with Debbie Gibson below: