Mariah Careyisn’t about to let a fashion emergency dampen her festive mood this Christmas season.

The five-time Grammy winner made a surprise appearance at New York’s Lincoln Center as part of the French winery Moët & Chandon’s holiday party Monday night. At one point during the event, she treated guests to an intimate performance featuring her hits “Heartbreaker,” “Honey” and, of course, “All I Want For Christmas Is You.”