Fans attending Game 1 of Thursday's day-night doubleheader between the Padres and the Mets at Citi Field were agog at the sight of a peeved Lady Gaga.

The pop artist -- known for hits like "Poker Face" and "Bad Romance" -- took in the game from a luxury suite. At one point, reportedly upset at photographers, she responded with an obscene gesture.

Lady Gaga was not back at Citi Field for the second game. Before becoming Lady Gaga the pop sensation, she was Stefani Joanne Angelina Germanotta, a Yankees fan who frequently attended games in the Bronx with her father. She was in town this week for her sister's high school graduation.