Several fans flocked to the infamous venue after learning their idol was inside - and when Gaga discovered their loyalty, she paid for them all to have burgers and fries.
And the singer also sent down a personalised letter to her devotees, who she refers to as 'Little Monsters'. The note read, "Dear little monsters. Thank you for singing to me all day and night. I love you with all my heart.
"You make everyday worth living. Kisses to the cops for keeping you safe. Love Lady Gaga."