PopUps: Chrissy Teigen Enters Husband John Legend in Battle of the Butts

Who has the best butt?

It's been an insane month for male celeb butts. First came fashion designer Marc Jacob's accidental nude on Instagram, then on Monday, Justin Beiber broke the Internet when he purposefully bared his bottom in the glowing sunlight of Bora Bora. Now crooner John Legend has been thrown into the battle of the butts, thanks to his wife Chrissy Teigen.

The couple are currently in Paris for Haute Couture Fashion Week and were affectionate on the red carpet, the Daily Mail reports. But the lovey-dovey duo stepped up their sexy game when Teigen, 29, decided to post a photo of Legend, 36, in their hotel room, showing off the singer's backside.

Teigen recently made headlines after posting a photo from a recent photo shoot for W Magazine to her Instagram account, Gawker reports. The pic showed her topless and Instagram later deleted the image and the model has since become a champion to "free the nipple."

"The nipple has been temporarily silenced but she will be back, oh yes, she will be back," she tweeted on June 29.

So it only makes sense that Teigen tagged the official Instagram page in the nude photo of her hubby, prodding the social media website to take action or not.

As of this writing, the picture is still on Teigen's Instagram page, which has 2.6 million followers. The image has been liked over 167,000 times.

In exciting times like this, who knows who will be the next hottie to expose himself!