Joaquin Phoenix has recalled Lady Gaga “spitting up coffee” when she first heard his singing voice on the set of ‘Joker: Folie a Deux’. The 49-year-old actor reprises the role of Arthur Fleck/The Joker in the sequel and reflected on how he received vocal tips from the pop star turned actress – who stars as music therapist Lee/ Harley Quinn. In an interview with Empire magazine, Joaquin quipped: “I do seem to remember her spitting up coffee the first time I sang, so that felt good, that was exciting, and made me feel confident. “Gaga was always very encouraging of just, ‘Go with what you feel, …