Folie à Deux,” Lady Gaga will introduce audiences to Lee Quinzel, her version of the Joker’s love interest Harley Quinn from the DC comic books.

"Sometimes we can go through dark times and feel like happiness is an accident when it happens," she told Kimmel.

In an interview with CNN, Gaga explained just how much she had to change her typical approach to performing for the movie, which does double duty as a somewhat pared-down musical and a dark love story between Joker, a.k.a. Arthur Fleck (Joaquin Phoenix), and Gaga’s character.