Jimmy Fallon invited a group of Mariah Carey superfans - her 'Lambs - onto his show, to listen to her new song 'The Art Of Letting Go'.
What they didn't know is that Mariah herself was in the studio next door performing the song live, and when she revealed herself to the groups of fans there were some brilliant reactions.
Mariah Carey's new single 'The Art of Letting Go' is out now.
Tagged in Mariah Carey