WHEN it comes to classy celeb style, Rihanna is truly bringing up the rear.
The You Da One singer, 24, posed for a cracking shot in this month's Esquire magazine - showing her bum in a revealing leotard.
The Bajan beauty teamed the look with bleached blonde hair and a camouflage coat.
And she's not the first star to enjoy a 'butt cleavage' moment.
From Heidi Klum to Katy Perry, the big names know that boobs are the old news of cleavage.
And that if you really want to get to the top you have to start at the bottom.
But the style isn't always all it's cracked up to be. See the best and worst
examples in our pictures special.
There's Klum-thing rather unusual about Heidi's sequin showstopper.
The model wore this ass-tounding creation to a Victoria's Secret show in 2007.
Liberty X singer Michelle chose an X-rated stretch jersey dress for the World Music Awards in 2006.
The silver-flecked frock was cut Just A Little too low for common decency.
Less about cleavage and more a full-scale visual ass-ault, Charmed star Rose's 'naked' dress is off the chain.
She kindly took the spotlight off boyfriend Marilyn Manson's leopard-print suit at the MTV VMAs in 1998.
Rapper Ice-T's missus wore this eye-popping cut-out dress on the catwalk at New York Fashion Week in 2010.
We'd say a few more outfits like this and her days of obscurity are behind her.
It's rare that Katy is upstaged by an ass since her split from Russell Brand.
But this cheeky print dress proved an exception to the rule at the Logie
Awards in Australia.
Fashion designer Hussein Chalayan hit a bum note with this chortlesome dress from his Fall 2009 collection.
The cheeky fella is said to have created the glitter dress - complete with
fabric bum crack - as a comment on the recent trend for bottom-baring jeans and frocks.
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