Lady GaGa surprised drinkers at a hotel bar in New York City on Wednesday night (18Jun14) by putting on an impromptu performance.

The Poker Face star showed up at the Gramercy Park Hotel's Rose Bar in Manhattan with jazz musician Brian Newman, who has been working with the singer on a collaboration with Tony Bennett.

The pair put on a brief performance for patrons, and a source tells New York Post gossip column Page Six, "They sounded great."

Earlier that day, Gaga and Newman had matching tattoos inked as a tribute to Bennett, and they also visited Arlene's Grocery, a music venue where the pop star performed before finding fame.