Celine Dion wowed the crowd when she took the stage at the Grammy Awards. Her every move was closely watched due to stiff-person syndrome. However, a touching video from behind the scenes of the awards ceremony was leaked online. Dion sang a spontaneous duet with singer Sonia Eliza. The video is noteworthy because the stiffness syndrome affects the patient’s singing voice. The legendary singer has not performed in public since 2019.