This may stir up some trouble between BFFs Gwyneth Paltrow and Beyonce Knowles.

Though Bey was one of the co-chairs for Monday's Met Gala in NYC, the "Iron Man 3" star wasted no time trashing the extravagant affair -- telling USA Today the event was "so un-fun."

"I'm never going again," Paltrow reportedly said. "It was so un-fun. It was boiling. It was too crowded. I did not enjoy it at all."

Thems fightin' words!

Gwyneth, who walked the red carpet in a pink Valentino gown, attended the gala with husband Chris Martin -- though they arrived separately.

Though Paltrow clearly didn't enjoy herself, she may be the only one who feels that way.

Check out the gallery below to see some killer candids from inside the event -- definitely looks like Beyonce, Kim Kardashian, Madonna and Katie Couric had a great time. 


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