There are also a huge number of speculations lurking around Twitter—from claims that the snippet is from a song called “HappyMistake” to suspicions that a ~secret project~ titled Harlequin will ...
(Photo by Monica Schipper/Getty Images) Lady Gaga performed a rendition of ‘HappyMistake’ inspired by her character of Harley Quinn from Joker: Folie à Deux while on Jimmy Kimmel.