If you're looking for similar colors and finishes (a.k.a. dupes) of the #1 selling NARS Orgasm blush, try this one:
Both blushes are a peachy-pink color with gold shimmer/sheen to them. Though the NARS one has more noticable gold flecks, Mark 'After Glo' blush is slightly darker and a little goes a long way. Personally I prefer the .mark blush seeing as it looks better during the day time.
The great thing about this color is the fact that it would suit most skin tones, in particular fair-medium.