She captioned this Instagram pic 'busted ass naked' but forgot the hashtag #underboob.
Peek-a-boob! We're not sure Beyonce posted this underboob shot on purpose to her Tumblr page. But hey, when you have that many minders, surely one of them can cast their eye over your social media posts.
The queen of underboob shared this pic of the official Diamonds tour billboard with Instagram followers.
Beyonce proved beyond a doubt she is deserving of her title as GQ's hottest woman of the 21st Century with this steamy front cover, which features her toned stomach and flashes just the right amount of underboob.
Miranda's plethora of Victoria's Secret outfits gaped in all the right places, provided the perfect opportunity to flash a bit of underboob.
Miley went for a dominatrix look at a concert in Hollywood in December 2012, giving onlookers an eye-full of her chest.
The pop singer appears to enjoy showing off her assets, donning a skimpy strapless top for an interview on The Tonight Show with Jay Leno.
Showcasing both sideboob and underboob, Rihanna shared this revealing pic with Instagram followers.
An unexpected repeat offender, Miranda chose a black mini with a plunging neckline for the Victoria's Secret after party.
Rihanna shared a pic of her new tattoo with Twitter followers, which depicts Egyptian Goddess Isis and is a tribute to her grandmother.
The normally demure singer donned a white Calvin Klein dress featuring a plunging neckline and a cheeky flash of underboob for last year's People's Choice Awards.
The sultry songstress was the only woman to be featured on the magazine's 'Men of the Year' issue, where she opened up about love, sex and relationships.