Whose butt?Whose butt?Someone's showing off a peachy behind.

But just who owns this denim derriere?

Say hello to the pert posterior that belongs to a certain Hollywood star.

Oddly enough, a shortening of her first name just happens to rhyme with a shortening of the very material showing off her tush - denim.

So, our hint to you is that "Den" was spotted out and about in California.

And crikey, we'd hate to know just how many squats are needed to own a posterior in that kind of shape.

It's impressive - and she's had a couple of sprogs.

See who owns this denim butt, and other stars showing off their bottom glory in good jeans.