Demi Lovato performed her new single ‘Dancing With The Devil’ on The Tonight Show Starring Jimmy Fallon yesterday (April 9) – watch it below.The singer, who released her new album ‘Dancing With The Devil… The Art Of Starting Over’ earlier this month (April 2), also sat down with Fallon to discuss the album, collaborating with Ariana Grande and her revelatory YouTube docu-series.“It was very challenging because everything I went through in that storytelling journey in making the documentary was