Never mind what Victoria's secret is. One of the brand's Angels has a confession - Behati Prinsloo goes braless on the regular.

Engaged couple Adam Levine and Behati Prinsloo are on their way to their rock star and model fairy tale, bra optional. While the Namibian beauty struts and preens for Victoria's Secret, her everyday life has a more natural feel. The model told Confidential, "Don't go naked but if you're not wearing a bra and it's appropriate, totally." Of course, Behati forgot to mention which occasions call for an appropriate braless outfit, or an inappropriate braless outfit.

Tara Reid is a given, but here are a few more celebrities who let it all hang loose. And in their case, bright cameras, ill-fitting clothing, and a few other factors made for bra-free disasters.

Lady Gaga is a serial offender when it comes to either not wearing a bra, or wearing a bra as a shirt. At the 2011 CFDA Fashion Awards, the aqua wig-wearing "ARTPOP" singer donned a sheer Mugler custom dress with a studded, corset top and a dramatic mullet skirt. Lady Gaga gave a show as she posed on the purple carpet. With all her hand-on-hip and monster claw movements, the singer's top slipped downward and gave photographers and crowds an eye-full.

Joining Lady Gaga on the serial offender list is Rihanna. If Behati Prinsloo goes braless when she's off duty, so does the "Stay" singer. Rihanna, or Badgalriri on Instagram, has that bad gal, bra-free attitude even on visits to her favourite restaurants, where she's often snapped sans undergarments. On one of those visits, Rihanna not only bared everything, she bared everything in a puzzling ribbed and mesh sweater, distressed jeans, and worker boots.

Sexy French actress Emmanuelle Seigner was arm-in-arm with husband Roman Polanski at the premiere of his film "La Venus a la Fourrure" during the 2013 Cannes Film Festival. "Low-cut" barely described Emmanuelle's Alexandre Vauthier gown. Her red dress had a neckline that plunged almost to her navel, a ruched waistband, and a skirt with a daring slit. Not only did Emmanuelle have to keep minding the gap to make sure her breasts stayed in place, the dress wasn't even that flattering.

Whether Behati Prinsloo goes braless or not, even with her collection of lingerie and her Victoria's Secret modeling duties, she does have a point when she says, "Everybody has the same. It's a body, it's beautiful."

Start the slideshow for a look at Behati Prinsloo, Lady Gaga, Rihanna, and Emmanuelle Seigner's braless moments.

For more celebrity style, read:

Erin Heatherton is 'Body by Victoria' Beautiful; Steal the Model's Style [SLIDESHOW]

Behati Prinsloo: Adam Levine's Fiancee in Her Five Best Style Moments [SLIDESHOW]

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