Mairead is performing Friday, February 22nd as part of the Festival Fundraiser at the Ormond Beach Performing Arts Center (Florida).
Site:
http://ormondbeachcelticfestival.com/I don't think tickets are available yet.
It doesn't overlap with the Ancient Land tour in Florida (it's a few weeks before the tour starts) and there's no realistic chance of me making it there for a single show that early in the year.