But what if we told you that the dynamic duo shun high-end products and luxury beauty brands for something much more pocket friendly when it comes to sculpting?
Well you better believe it!
Earlier today, make-up maestro Mario took to Instagram to let his fans - and beauty obsessives alike - in on his biggest contouring secret and revealed that Kim's forever-seamless look is all down to this nifty little pocket-friendly palette by Contour Cosmetics.
The best part? It boasts a total of six fabulously creamy shades and will only set you back £28 - hurrah!
Mario shared a snap of Keeping Up With The Kardashians star Kim in the make-up chair and captioned it: "I tried this @contourcosmetics kit on @kimkardashian the other day and I'm loving it.