A "holiday" bonus for Thanksgiving and again for Christmas/year end? Wish my boss would go along with that plan!
I give an extra year-end tip, but if you will (before she fired you) see her again before year end, she's got a lot of nerve expecting something now. Someone needs to explain the definition of "tip" and "gift" to service workers. I would find a new hairdresser and good riddance.
If you are feeling generous, follow up with a note to the salon owner. Offer a "tip" that this type of behavior alienates customers.