Kim Kardashian shows off killer curves as she squeezes into VERY tiny Mr. Pearl corset in throwback video from London fitting... after wearing similar look for Met Gala

Kim Kardashian has become the shapewear icon thanks to her line Skims, inspired by her signature curves.

But the KKW Beauty mogul turns to other artisan designers for her own extreme hourglass needs.

She squeezed into an impossibly tiny Mr. Pearl corset in a throwback video she posted Monday to Instagram from a recent London fitting.

The 39-year-old filmed herself in a round mirror as she worked her angles in the tiny nude singlet.

She wrote in the caption: 'Just found this in my phone from my special trip to London last year to meet w Mr. Pearl. 

'I wore a corset like this for the Met Ball for my @manfredthierrymugler Camp look but the corset was misplaced that night and I want it so badly preserved for my archive that I flew to London to have another made for the archive. 

'We also might have started making a few more looks including my special 40th bday look. Can’t wait to show you the LOOKSSSS we’ve been cooking up.'