The 'Bad Romance' singer joined jazz musician Brian Newman for a small performance in New York.
Lady Gaga: backstage catwalk demands
Lady Gaga's backstage demands for her catwalk debut in Paris has been revealed.
The Mirror reports she was given a special 'VIP' dressing room which she called the 'boudoir'.
An insider said: 'She was so nervous before her show that she didn't leave her 'boudoir' and asked for a sick bucket to be on hand just in case.'
She treated her entourage to '10 bottles of champagne and platters of meat and seafood'.
After her catwalk appearance she want to Maxim's restaurant and 'devoured at £26 steak tartare'.
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