When Susan Boyle Played the Piano and Simon Cowell Joined Her in a Shocking “Fix You” Duet — the Royal Albert Hall Stood Still!!! No one expected it — but when Susan Boyle sat at the piano and began to play “Fix You”, the audience held their breath. Then Simon Cowell stepped onto the stage and joined her in the most emotional duet of the night. Their voices, raw and vulnerable, intertwined in perfect harmony. The crowd at the Royal Albert Hall rose in tears and awe.