Melissa Joan Hart was one of the darlings of the 90s, starring in wholesome sitcoms "Clarissa Explains It All" and "Sabrina, the Teenage Witch." Although she was known for her good-girl image, Hart admits she had some wild nights in her 20s. In the above clip from Sunday's upcoming "Oprah: Where Are They Now?," she shares "the craziest thing" she did during her partying phase.

"I did 'Sabrina' from [ages] 20 to 27," Hart says. "And yeah, at the beginning, it was my first time really hanging out in L.A., and starting to make my own money, bought my own house, starting to go out and party and do all this crazy fun stuff -- and just really enjoying my life as an adult for the first time."

Hart landed the cover of Maxim magazine, but says she didn't exactly prepare for the all-day shoot. "I'd gone to the Playboy Mansion the night before and had a little too much fun, explored a little too much of that Playboy Mansion," Hart says.

Hart first detailed the wild night in her book, Melissa Explains It All, revealing that she took ecstasy at the party and made out with another girl in the limo ride home.

"And so the next morning I rolled up to the Maxim photo shoot and I was pretty hungover and coming down," she says in the video. "And here I was, having a full day of ... hair extensions and bikinis, and I was not prepared for it -- so that was probably the least professional I've ever been in my career."

In the video below, "Oprah: Where Are They Now?" Executive Producer Jill Van Lokeren and Producer Julie Mirlicourtois talk more about Hart's controversial tell-all on HuffPost Live.

"Oprah: Where Are They Now?" airs Sunday at 10 p.m. ET on OWN. Programming note: In 2014, "Oprah: Where Are They Now?" airs on a new day and time. Catch up with past "Oprah Show" guests, newsmakers and celebrities on Fridays at 9 p.m. ET, beginning Jan. 3.

Also on HuffPost:

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  • Jada Pinkett Smith

    This <a href="http://omg.yahoo.com/news/rihanna-admits-she-likes-spanking-other-celebrity-tmi-20110406-181700-559.html" target="_blank">interview in 2009 </a>sums it up: "When you have three kids, you've got to take your opportunities when they come. In a limo, on the way to the Academy Awards this year, Will started looking at me in this way that drives me wild. We started kissing passionately, and the next thing I knew, well, let's just say we missed the red carpet and I ended up with almost no makeup on," Pinkett-Smith said.

  • Brandi Glanville

    After finding out her ex-husband was cheating on her, Brandi Glanville talked at length about her vaginal rejuvenation in her tell-all book. "I decided that since Eddie ruined my vagina for me, he could pay for a new one," she said.

  • Chrissy Teigen

    When she was on "Fashion Police," the Sports Illustrated swimsuit model talked about how she <a href="http://www.huffingtonpost.com/2013/08/12/chrissy-teigen-underwear-fashion-police-video_n_3743231.html?utm_hp_ref=style&ir=Style" target="_blank">never, ever wears underwear. </a>Not even during that time of the month. EW.

  • Beth Stern

    When speaking of hubby <a href="http://www.usmagazine.com/celebrity-news/news/howard-sterns-wife-beth-stern-his-manhood-keeps-me-very-happy-2013294" target="_blank">Howard's self-deprecating ways,</a> Beth had this to say: "It keeps me very happy, his penis. How's that for you?"

  • Courtney Stodden

    Between the <a href="http://www.huffingtonpost.com/2013/08/01/courtney-stodden-bikini-peta_n_3688120.html" target="_blank">lettuce bikini</a> and <a href="http://www.huffingtonpost.com/2013/07/08/courtney-stodden-style-fishnet-dress_n_3560654.html" target="_blank">the fishnet dress</a>, what isn't TMI about Courtney? Seriously.

  • James Franco

    Franco discusses being alone and the "pleasure" that comes with it. "I’m in hotels a lot for a lot of my life. And I don’t mind it because I have a lot of stuff to do on my own. I have a lot of reading to do for school or whatever. So, when I’m alone, I do masturbate a lot. I don’t know why, I tend to have a four- or five-time days."

  • Jennifer Lawrence

    J-Law is basically the queen of no filter speak, but our favorite just might be about <a href="http://www.eonline.com/news/305079/katniss-craziness-jennifer-lawrence-s-top-five-tmi-moments" target="_blank">the first time she hung out with her BFF Zoe Kravitz. </a>"I go over to her apartment, and she opens the door in a towel. She's like, 'Come in, sorry, you're early, I was about to shower.' And she drops her towel and gets in the shower, and starts shaving her legs, totally naked. She was like, 'Are we here yet? Is this OK?' And I was like, 'I guess we're there!'" Kravitz said.

  • Jennifer Love Hewitt

    When promoting her book in 2010, <a href="http://www.aoltv.com/2010/01/13/jennifer-love-hewitt-shocks-george-lopez-with-vagazzling/" target="_blank">Hewitt talked to George Lopez about bedazzling her "lady parts." </a> "After a breakup, a friend of mine Swarovski Crystaled my 'precious lady' and it shined like a disco ball, and so I have a whole chapter in there about how women should 'vagazzle' their vajayjays," she said.

  • Jessica Simpson

    Simpson took to Twitter during much of her pregnancy, with one of the most cringe-worthy being a response to a tweet about passing gas. She claimed that "the average pregnant women fart 15 times the amount of a normal person." Yuck.

  • Ke$ha

    Ke$sha's tweet read: "pee pee on the street. PoPo come n get me if u can find meeee. I blame traffik."

  • Kris Jenner

    The new talk show host's most recent confessions: <blockquote><a href="http://www.huffingtonpost.com/2013/07/25/kris-jenner-khloe-kardashian-faking-orgasms_n_3651429.html" target="_blank">joining the mile high club and faking the big "O."</a></blockquote> We're sure her family just looooved hearing that!

  • Kyra Sedgwick

    After <a href="http://www.usmagazine.com/celebrity-news/pictures/celebrity-sex-confessions-2013246/31309" target="_blank">Sedgwick and Kevin Bacon's children left home for college, </a>she admitted that they both walk around the house naked. A lot.

  • Martha Stewart

    Stewart has <a href="http://www.usmagazine.com/celebrity-news/news/martha-stewart-admits-to-sexting-reveals-she-maybe-had-a-threesome-2013276" target="_blank">admitted to sexting</a> and said she "might" have had a threesome.

  • Megan Fox

    This stunning actress <a href="http://www.huffingtonpost.com/2012/12/12/9-celebrity-confessions-of-poor-hygiene_n_2285828.html#slide=1873811" target="_blank">isn't as clean when it comes to her private life.</a> “I’m horrible to live with. I don’t clean. My clothes end up wherever I take them off. I forget to flush the toilet. Friends will tell me, 'Megan, you totally pinched a loaf in my toilet and didn’t flush.'"

  • Michael Douglas

    Aside from the repulsive HPV comment, Michael Douglas keeps things spicy with the help of the little blue pill. "Some wonderful enhancements have happened in the last few years—Viagra, Cialis — that can make us all feel younger."

  • Olivia Wilde

    Wlide lives in infamy for <a href="http://www.ivillage.com/olivia-wilde-and-jason-sudeikis-have-sex-kenyan-marathon-runners/1-a-493081" target="_blank">her comment about her bedroom life with Jason Sudeikis.</a> "We have sex like Kenyan marathon runners."

  • Rob Kardashian

    After his recent weight gain, <a href="http://www.huffingtonpost.com/2013/04/23/rob-kardashian-weight-loss_n_3138016.html" target="_blank">Kardashian admitted to crying every time he was in the shower.</a> It was because his penis looked small.

  • Soulja Boy

    NSFW NSFW NSFW NSFW

  • Roberty Downey Jr.

    RDJ got very personal back in 2008. We can only hope he changed his ways. "I was a compulsive, serial masturbator," The Iron Man actor told The Sunday Times in October 2008. "But it was the best thing I could have been. I utilized that organ and rode it for everything it was worth."

  • Jenny McCarthy

    She's notorious for tweeting about her lady parts.

  • P. Diddy

    Thanks for that visual, Sean.

  • Chris Brown

    Nice Halloween costume, Chris. We can only hope that's a candy bar in his pants.

  • Holly Madison

    Still TMI, Holly. "Wanted to share a picture of what my placenta pills look like after they are made. Much less gory looking than I anticipated!"

  • Lindsay Lohan

  • Lenny Kravitz

  • Bow Wow

    The rapper tweeted this picture shortly before deleting his account. We don't even want to know who's taking it.

  • Demi Moore

  • Hayden Panettiere

  • Miley Cyrus

  • Kim Kardashian

  • Tori Spelling

  • Rihanna

  • Katy Perry

  • Janet Jackson

  • Kim Kardashian

  • Katherine Heigl

  • Celine Dion

  • Pippa Middleton

  • Jennifer Lopez

  • Snooki

  • Courteney Cox

  • Justin Bieber

  • Sarah Jessica Parker

  • Nicki Minaj

  • Emma Watson

  • Selena Gomez

  • Selena Gomez

  • Lady Gaga

  • Emma Watson

  • Demi Lovato

  • Courtney Love