How Lady Gaga Helped Joaquin Phoenix With His 'Joker: Folie à Duex' Singing (Exclusive)
Lady Gaga chats with ET's Denny Directo at the premiere for 'Joker:…
'Joker: Folie À Deux' Official Trailer No. 2
Lady Gaga stars as Harley Quinn, alongside Joaquin Phoenix, in the trailer…
