As the Met Gala was cooling down ... pizza ovens were heating up and some of the biggest stars changed out of their fancy outfits to grab a slice before bed.
Cardi B didn't even wait to strip out of her gigantic quilted gown, by Thom Browne, until she hit up room service for a delicious combo of steak and pizza.
Keeping it classy, Cardi opted for pepperoni on top of her pie.
She opted for a comfy cotton robe while chowing down on an impressive looking slice. It's unclear from the vantage point, but we think she went with a supreme topping.
Meanwhile, Hailey's husband, Justin Bieber, didn't have to attend the Met Gala to enjoy his cheat meal. JB showed off an impressive spread, including fries and a huge piece of chocolate cake that was enjoyed while Hailey got ready for her night out.