It is very funny to watch these ladies immediate reaction to seeing their makeovers. They're obviously expecting a moment in the mirror where they get to feel beautiful, cherished, pretty. Haha, stupid! You look like a stupid person with bad make-up! Pranks are the worst. After their natural reactions are under control, the women try really hard to talk positively about how they look, for the most part. By the end even the people who set this prank up seem kind of bummed, probably because the whole thing has now become a study in how far women will go to be polite. 

Sources: BuzzFeed Video