Somebody send a warning to J.Lo: Looks like she has some serious competition coming in from the rear.

This onetime high-fashion über-hottie is not generally known for her backseat assets, but rather her steamy relationship with a hot prime-time TV actor as well as her own big-screen work with Quentin Tarantino and Nicolas Cage. But now we can add another credit to the 35-year-old's profile: sneaky stealth ninja booty queen!

So, any guesses about who wore this glittering, rose-gold, disco ball of a Vivienne Westwood to the Amour premiere during the Cannes Film Festival this week?

READ: Guess Me From Behind: Bootylicious Paparazzi Magnet

 

 

 

It's German actress Diane Kruger!

The Teutonic hottie's longtime boyfriend Joshua Jackson was at her side as she rocked this fully sequined number for a very lucky France.

We hear it rained shortly after she took this photo. Two pieces of sweet news: Jackson carried an umbrella for his lady—awww!—and disco balls are totally waterproof.

PHOTOS: 2012 Cannes Film Festival: Star Sightings

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