He shared a video of the sweet duet on Instagram March 2, which sees him settled behind his signature piano as Chappell—who sported a Moulin Rouge-inspired white top and gold-buttoned vest combo ...

Partygoers were then surprised when the night’s host, Sir Elton John, moved through the crowd to join Chappell onstage. The “Rocket Man” then sat down at the piano to perform “Don’t Let ...