They say beauty is pain, and Kim Kardashian proved that recently at the Met Gala when she arrived in a dress that made her waist look impossibly tiny.

While some users on social media speculated that she had her ribs removed, the truth is it all came down to corsets and exercise.

A new Vogue video revealed Kardashian had a corset created by Mr. Pearl, a corset maker based in Paris who collaborates with the likes of Dita Von Teese and Thierry Mugler.

Kardashian also trained at the gym for six days a week, and had to practice corset breathing exercises.

And it wasn’t just breathing that was a struggle – Kardashian also wasn’t able to sit down properly thanks to the outfit.

“7 months in the making and fittings in Montreal, Paris and LA. Corset breathing lessons from none other than Mr. Pearl. It was worth it all!!!” Kardashian wrote on Instagram.