I use the Sculpt and Shape duo powder from MAC, in Accentuate & Sculpt. I think it's from the Dsquared collection. I apply the darker side with the 168 brush, to give some depth. I actually don't use the lighter side too much b/c I highlight my cheekbones with a mineralize skinfinish. I am not sure if this is what Kim K's makeup artist uses, but it's what I use to contour. I would love to hear what everyone else thinks, b/c I love Kim K's looks!