http://www.eroticperfection.com/gals/metart114ks.html
I started a search, found a Masha I thought was the one but after looking at ten pages of the same girl I'm not sure.. Therefore I will put this here so you can be the judge (and the jury).
She appeared only once during 2005 just as Masha "Live on MET". Don't recognize her from other sites
http://www.met-art.com/c53/11305-Masha-Live-On-MET.jpg