Mariah Carey Crashes 'Schitt's Creek' Cast Performance of 'Hero' on YouTube's 'Dear Class of 2020' - Watch! (Video)

Mariah Carey is crashing the party, darling! The Caution diva made a special cameo during the Schitt’s Creek cast’s appearance on YouTube’s Dear Class of 2020 virtual commencement ceremony on Sunday (June 7). PHOTOS: Check out the latest pics of Mariah Carey The cast reunited for the special virtual graduation ceremony in character, serenading grads