CBS7 “When I say that I’m happy to be here, I really mean it from my heart,” Dion told the audience. Getty Images for The Recording AcademyDion’s surprise appearance was the Grammys’ best kept secret, as it had not been previously reported. “Celine Dion is in the building for the #Grammys with stylist Law Roach,” the Hollywood Reporter tweeted. The six-time Grammy winner revealed she was diagnosed with stiff person syndrome in December 2022. 7 Dion has been privately dealing with a disorder called stiff person syndrome.