The actor-singer plays the role of Harley Quinn
Lady Gaga wraps up shooting for Joker: Folie a Deux
Lady Gaga spotted singing and dancing on sets of Joker: Folie a Deux
She was spotted at the same staircase where Joaquin Phoenix #39;s titular character danced in the 2019 film
Joaquin Phoenix's first look from Joker: Folie a Deux out
The film, which is the sequel to 2019-released Joker, has Joaquin reprising his character Arthur Fleck