Roan performed an 11-song set at the party, ending with a cover of “Don’t Let The Sun Go Down On Me” and her own “Pink Pony Club,” both with John. You can watch the footage here.

What better place to transform to a Pink Pony Club than Elton John's annual Oscars viewing party? On Sunday night, Chappell Roan took the stage for a full concert that included a historic duet with John of his classic "Don't Let the Sun Go Down on Me" and her hit "Pink Pony Club.

Chappell Roan performed with Elton John at his 33rd Annual AIDS Foundation Academy Awards Viewing Party. The 27-year-old took the stage with the 'Rocket Man' singer to sing his 1974 hit, 'Don't Let the Sun Go Down on Me,