It's been called 'America's best butt' - and it doesn't belong to Jennifer Lopez or Kim Kardashian.
Natasha Wagner, a 34-year-old model from Los Angeles, has the best booty in the country according to the premium denim industry.
Her size six figure is hailed as a 'secret weapon' by a number of the world's most popular denim brands, including 7 For All Mankind, Paige Denim, Levi's and Citizens of Humanity.
All of these brands have been counting on her backside to help them create the ideal fit for over a decade.
As Jennifer De Clark, the senior director of women's design and merchandising at 7 For All Mankind, explained: "Natasha's curves are in all the right places. And having the perfect proportions is key to a great jean that will fit many different body types."
'I feel very flattered'
With her 28-inch waist, the 5'8" model is the median in the standard range of jean sizes, which typically run from a size 24 to size 32.
Natasha said: "I feel very flattered that anyone would say I have a perfect butt. My job is to go in, try on jeans and try and stay the same size."
To achieve the 'perfect' derriere she sweats though 100 squats a day and spends 45 minutes on the treadmill.