Hi! I'm not sure about makeup, but I know they do hair. I had my hair done for formal night on the Magic a few years back. my hair is very long and they curled it. It looked great! I know they do updos as well as a girl was getting one while I was gettting mine done. HTH
Makeup is not listed as one of the options at the Vista Spa & Salon, and I haven't read any trip reports so far where the bride had her makeup done there. However, it seems like most salons on land have at least one cosmetologist who can do makeup, so surely there's someone onboard who could.
If you end up asking your planner about this, let us know what she says!
Just to let all the Disney Cruise Brides and VR Brides know, that they don't have anyone specific on the ship that does makeup. However, once in awhile some of the stylists onboard are make up artists. We just have to wait until we get onboard.