AceShowbiz - Lady GaGa reportedly upset a fan in New York City over the weekend by fuming at the hapless devotee after he took her picture in a restaurant. The pop superstar was enjoying dinner at upmarket eaterie Asia de Cuba with a large group of friends, when she caught a fellow diner snapping a photograph from across the restaurant.

GaGa is said to have stormed over to confront the fan, demanding he delete the picture and refrain from taking any more snaps, according to New York Post gossip column Page Six. A source tells the publication, "GaGa became noticeably upset, pushed her security team out of the way to confront the shutterbug and demanded he delete the photo."

The unfortunate photographer is said to have obliged and the singer returned to her table.