Sharon Osbourne ruined her niece's party with a stripper who used his own genitals as a wristwatch

Sharon Osbourne's flair for flamboyance led to total disaster at her niece's bachelorette party -- and we're talking the kind of nightmare from which you never quite recover.

The "X Factor" judge was excited to help plan her English niece's bachelorette party. In an attempt to add some pizzazz to the affair, she hired a male stripper for the event, despite knowing that her niece is "a very nice girl," she said.

It did not go over well.

"The stripper came in and of course I told him who was the bride-to-be," Osbourne told The Sun. "And he was doing his thing, and he stripped off totally naked. She was sat at table and he went behind her and put his penis on top of her head -- she had long hair and he got her hair and he was wrapping it around his penis."

Sorry, it doesn't end there:

"Then he stopped that and stood right at the side of her and he said, 'Can you tell me what time it is?' But he had wrapped his penis around his wrist," Osbourne said. "She started to cry so bad, she was sobbing and shaking, and I had to take her outside. I felt so bad."

Lesson of the day: Don't put Sharon Osbourne in charge of party-planning, unless you're curious about the mechanics of a willy wristwatch.

Filming is currently underway for next season of "X Factor," where Osbourne judges alongside Simon Cowell, Louis Walsh and Nicole Scherzinger.

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Sharon Osbourne in recent years
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Sharon Osbourne in recent years
LONDON, UNITED KINGDOM - JUNE 19: Sharon Osbourne attends the X Factor Auditions on June 19, 2016 in London, England. (Photo by Alex Huckle/Getty Images)
LONDON, ENGLAND - JULY 09: Sharon Osbourne arrives for X Factor auditions at Wembley Arena on July 9, 2016 in London, England. (Photo by Luca Teuchmann/WireImage)
BEVERLY HILLS, CA - MAY 23: Sharon Osbourne attends the Jewish Family Service of Los Angeles 23rd Annual Gala Dinner at The Beverly Hilton Hotel on May 23, 2016 in Beverly Hills, California. (Photo by Tibrina Hobson/Getty Images)
HOLLYWOOD, CA - MAY 12: Sharon Osbourne attends the Ozzy Osbourne and Corey Taylor special announcement at the Hollywood Palladium on May 12, 2016 in Hollywood, California. Ozzfest and Knotfest are joining together for a weekend of music September 24th and 25th in San Bernardino, California. (Photo by Kevin Winter/Getty Images)
TV Personality Sharon Osbourne attends the press room for the 2016 Daytime Emmy Awards at Westin Bonaventure Hotel on May 1, 2016 in Los Angeles, California.
HOLLYWOOD, CA - MAY 12: Ozzy Osbourne and Sharon Osbourne attend the Ozzy Osbourne and Corey Taylor special announcement press conference on May 12, 2016 in Hollywood, California. (Photo by Tibrina Hobson/WireImage)
LOS ANGELES, CA - MAY 01: TV Personality Sharon Osbourne attends the 2016 Daytime Emmy Awards at The Westin Bonaventure Hotel on May 1, 2016 in Los Angeles, California. (Photo by Paul Archuleta/FilmMagic)
LOS ANGELES - APRIL 21: Actor Joel Kinnaman discusses his television series on 'The Talk,' Friday, April 22, 2016 on the CBS Television Network. From left, Carnie Wilson, Sara Gilbert, Joel Kinnaman, Sharon Osbourne, Aisha Tyler and Julie Chen, shown. (Photo by Sonja Flemming/CBS via Getty Images)
LOS ANGELES - APRIL 14: Oscar-winning actress Sally Field discusses her new film, Hello My Name Is Doris on The Talk Thursday, April 14, 2016 on the CBS Television Network. From left, Sheryl Underwood, Sara Gilbert, Sally Field, Sharon Osbourne, Aisha Tyler and Julie Chen, shown. (Photo by Ron P. Jaffe/CBS via Getty Images)
HOLLYWOOD, CALIFORNIA - APRIL 11: TV Personality Sharon Osbourne attends the ceremony to honor Cyndi Lauper and Harvey Fierstein each with a Star on The Hollywood Walk Of Fame on April 11, 2016 in Hollywood, California. (Photo by Paul Archuleta/FilmMagic)
Singer Cyndi Lauper(L) and and Sharon Osbourne attend the Hollywood Walk of Fame double star ceremony honoring Lauper and actor Harvey Fierstein in Hollywood, California, on April 11, 2016. / AFP / STR (Photo credit should read STR/AFP/Getty Images)
BEVERLY HILLS, CA - MARCH 12: TV personality Sharon Osbourne speaks onstage during the Family Equality Council Impact Awards on March 12, 2016 in Beverly Hills, California. (Photo by Tommaso Boddi/Getty Images for Family Equality Council)
LOS ANGELES, CA - JANUARY 08: Sharon Osbourne is seen out and about on January 08, 2015 in Los Angeles, CA. (Photo by Michael King/BuzzFoto via Getty Images)
LOS ANGELES, CA - JANUARY 06: Sharon Osbourne poses in the press room at the 2016 People's Choice Awards at Microsoft Theater on January 6, 2016 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
LOS ANGELES, CA - JANUARY 06: Sharon Osbourne poses on the press room at the 2016 People's Choice Awards at Microsoft Theater on January 6, 2016 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
LOS ANGELES, CA - JANUARY 06: (L-R) TV personalities Julie Chen, Aisha Tyler, Sara Gilbert, Sharon Osbourne, and Sheryl Underwood accept Favorite Daytime Talk Show Hosting Team for 'The Talk' onstage during the People's Choice Awards 2016 at Microsoft Theater on January 6, 2016 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
Sharon Osbourne and Aisha Tyler of CBS' 'The Talk' ring the closing bell at the New York Stock Exchange on December 9, 2015 in New York City. (Photo by John Lamparski/WireImage)
NEW YORK - DECEMBER 7: The ladies of The Talk in New York on Monday, Dec. 7, 2015 on the CBS Television Network. From left, Sharon Osbourne and Aisha Tyler, shown. (Photo by Heather Wines/CBS via Getty Images)
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