Victoria's Secret Angels are known for their feminine curves, but pictures of them off the runway seem to indicate their cleavage is merely a product of a very good push-up bra.
Indeed, they may look like buxom babes when dolled up in the Victoria's Secret catalog, but it seems most of these women are slender and curveless when left to their own devices, which goes to show that the brand's lingerie really does work.
Adam Levine's fiancee Behati Prinsloo, for instance, showed off her very slender frame in a light pink bikini on a recent trip to St Barts, displaying an almost completely flat chest.
And at the Victoria's Secret after party, her body-hugging pink dress appeared to fit loosely over her barely-there curves.
Indeed, while the 24-year-old's cleavage seemed to spill out of her bra on the runway, it was all but invisible just hours later.
The photos reveal just how slender the Namibian model is, with a body usually seen on an editorial model rather than a lingerie model.
She isn't the only Angel hiding Victoria's real 'secret'; Karlie Kloss also manages to make her super slim frame appear curvaceous on the runway.
The six-foot-one supermodel - who has starred in high-fashion ads for designers like Jean Paul Gaultier, Alexander McQueen and Dolce & Gabbana - showed off her cleavage in a white and yellow lace push-up bra during the annual lingerie fashion show.
Just a month before, however, the 21-year-old displayed not even a hint of curves when she attended a New York Fashion Week event in a white satin dress.
Cara Delevingne is another Angel whose curves play a disappearing act when she's off the Victoria's Secret runway.
Disappearing act: Karlie Kloss, 21, also manages to make her super slim frame appear curvaceous on the runway (left), compared to how it looks normally (right, at a New York Fashion Week event in September)
Body makeover: Lily Aldridge is no stranger either to the transforming powers of a push-up bra on the catwalk (left). Her narrow frame is apparent at the Costume Institute Gala in May (right)
The 21-year-old It girl looked buxom in a black corset at this year's show, wearing a sheer dress over her lingerie that gave the illusion of added curves.
Indeed, in a snap of her at the Victoria's Secret after party last year, the British beauty appears to have more of a boyish frame than a voluptuous one, with slim hips and a lack of cleavage.
The supermodel has even admitted that her frame is not as womanly and voluptuous as it is made out to be on the Victoria's Secret catwalk.
Inconsistent: Jessica Hart's perky cleavage on the Victoria's Secret runway makes her look super busty (left), but at the Valentino show at Paris Fashion Week, her purple gown hung off of her narrow chest (right)
Lily Aldridge, who walked her first Victoria's Secret show in 2009, is no stranger either to the transforming powers of a push-up bra.
The 28-year-old wife of Kings of Leon's Caleb Followill looked positively curvaceous during the fashion show, highlighting her chest in a baby pink ruffly bra.
Off the catwalk, however, her slim frame was made apparent when it was swamped in a golden gown at the Costume Institute Gala in May.
Erin Heatherton and Doutzen Kroes also display noticeably slimmer bodies when not donning Victoria's Secret lingerie.
21-year-old Erin looked curvy and well-endowed on the runway as she strutted her stuff in a light blue lacy bra and underwear.
But when she made an appearance at the Fashion Festival in Sydney, Australia, in August, the Illinois native could have been a different woman.
Not only was she dressed very demurely in a turtleneck dress and glasses, but she also seemed to have little to no curves.
And Dutch beauty Doutzen Kroes, 28, may have appeared busty in her bondage-inspired bra at the Victoria's Secret show, but her cleavage is decidedly nonexistent in a photo of her at an event on October 22.
Push-up bras are undoubtedly a major factor in the supermodels' ability to appear busty, but it's not the only secret to their curves.
In 2010, former Victoria's Secret model Selita Ebanks told the New York Daily News that body make-up helps them look instantly curvaceous.
And 29-year-old Angel Lindsay Ellingson told Fashionista in September that she likes to 'add curves' to her slim frame before each fashion show.