Natalie ImbrugliaWe all know that Natalie Imbruglia is a natural beauty...

She always looks fresh-faced and fabulous.

But this time she is taking au naturel to a whole new level.

The singer is the latest celeb to flash flesh for Peta (People For The Ethical Treatment Of Animals), all in the name of animal rights.

And for Nat, it is about more than just getting in the buff. The fiery Aussie has already been vocal about fur-wearing stars.

In a past interview with Cosmopolitan, Nat attacked Jennifer Lopez's personal and business use of fur for her clothing line, Sweetface.

"It can take up to 100 chinchillas to make one coat and Jennifer Lopez has one made of 80 of them, all killed by electrocution or having their necks snapped," she said.

In her latest campaign, Nat has written a two-page statement about the tortuous methods used to kill animals, and attacks China's fur trade. 

The ad features Nat with her natural brown bonce... but her boob display isn't completely visible.

It seems that she has a little friend covering her baps.

See who her pal is below in our gallery of stars doing Peta.