Actually, many professionals refuse to use MAC (for several reasons, including poor quality. Surprise surprise).
I use professional only brands that are specifically made for photography, print, and film work (not including mac or clinique). It looks beautiful in person, and just as good in photo's!. Many products which are sold to "regular," customers are not good enough to be used for wedding photography or video.
A good makeup artist will likely use products you've never heard of. Don't focus on the brand. Focus on the portfolio the artist has to display. You will be able to see if she/he is good based on those.
which brand do you use?..
and do u girls (makeupartist) use one layer of foundation ?... how are you used to apply the base on a bride?