Yes, it's definitely in one of the Holiday Mineralize Kits. There are 2 sets: Pinkzapoppin' (sp?) & Fun in the Sun.
Shimpagne MSF is included in the Fun in the Sun kit, which comes with a Mineralize Blush (Nuance) & a Mineralize Eyeshadow (forgot the name).
Light Flush MSF is included in the Pinkzapoppin' kit, which also comes with a pinkish Mineralize Blush & Mineralize Eyeshadow.
I wish the MSF's were sold on their own! They are both repromotes, but are only sold in these two kits (which are only out for holiday, AND only sold in MAC freestanding stores-not MAC counters).
I would've bought the Fun in the Sun kit, BUT i'd only want Shimpagne.. no need for the blush & eyeshadow. Although if you really want the MSF, you could buy the whole kit & sell the blush, e/s here on Specktra, on LiveJournal, or even on eBay (provided the items aren't used).