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(Imaxtree, Getty, Courtesy of Fox)

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Jenelle filed charges against boyfriend Keiffer Delp after he assaulted her. (Courtesy of MTV)

Madonna

Katie Holmes on How I Met Your Mother (Courtesy CBS)

Kris Jenner (Courtesy of Instagram)

Kelly Rowlands (SplashNews)

Rita Ora (Wenn)

Khloe Kardashian (SplashNews)

Nicki Minaj (SplashNews)

Lady Gaga at the 2011 CFDA Fashion Awards

Katherine Heigl at ShoWest in Las Vegas

Eva Longoria on The Late Show with David Letterman

Anne Hathaway at a movie premiere

Tara Reid (Splashnews)

Janet Jackson during the Super Bowl XXXVIII halftime show

Courteney Cox in Hawaii

Kristin Davis in New York City

Khloé Kardashian on FOX And Friends

(Imaxtree, Getty, Courtesy of Fox)

FRENCH CONNECTION BLOCK LEATHER DRESS, $498.00

Armani Exchange Faux Leather Mini Dress

BCBGMAXAZRIA Women's Faux Leather Sportswear Dress

Cynthia Rowley Women's Leather Skirt Swing Dress

Forever 21 Rhinestoned Contrast Dress, $29.80

Vince Camuto Faux-Leather Dress At Dillard's, $118

Free People Pleated Vegan Leather Dress, $110

Limited Faux-Leather Dropwaist Sheath, $58.80

Next Gallery

(Imaxtree, Getty, Courtesy of Fox)

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Jenelle filed charges against boyfriend Keiffer Delp after he assaulted her. (Courtesy of MTV)

Madonna

Katie Holmes on How I Met Your Mother (Courtesy CBS)

Kris Jenner (Courtesy of Instagram)

Kelly Rowlands (SplashNews)

Rita Ora (Wenn)

Khloe Kardashian (SplashNews)

Nicki Minaj (SplashNews)

Lady Gaga at the 2011 CFDA Fashion Awards

Katherine Heigl at ShoWest in Las Vegas

Eva Longoria on The Late Show with David Letterman

Anne Hathaway at a movie premiere

Tara Reid (Splashnews)

Janet Jackson during the Super Bowl XXXVIII halftime show

Courteney Cox in Hawaii

Kristin Davis in New York City

Khloé Kardashian on FOX And Friends

(Imaxtree, Getty, Courtesy of Fox)

FRENCH CONNECTION BLOCK LEATHER DRESS, $498.00

Armani Exchange Faux Leather Mini Dress

BCBGMAXAZRIA Women's Faux Leather Sportswear Dress

Cynthia Rowley Women's Leather Skirt Swing Dress

Forever 21 Rhinestoned Contrast Dress, $29.80

Vince Camuto Faux-Leather Dress At Dillard's, $118

Free People Pleated Vegan Leather Dress, $110

Limited Faux-Leather Dropwaist Sheath, $58.80

We have four words for these famous flashers: Cover it up, ladies! Which celeb do YOU think had the most embarrassing nip slip?

At this point, flashing a nipple — either accidentally or on purpose — is practically a rite of passage for Hollywood’s elite. Rita Ora was just the latest in a long line of celebrity nip slips, one that already boasts huge names like Lady Gaga, Anne Hathaway, and of course, Kris Jenner! Browse our gallery of the 17 worst celebrity nip slips and vote for the one YOU think is most embarrassing! Read More!