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.

The 26-year-old breakout, aka the Midwest Princess, is expected to do a 45-minute set inside the starry fundraiser co-hosted by Jean Smart, Sheryl Lee Ralph, Neil Patrick Harris and David Burtka.

Chappell Roan attended the Elton John AIDS Foundation's 33rd Annual Academy Awards Viewing Party held tonight in Los Angeles. The musician is set to perform some of her hit songs at the event. The "Pink Pony Club" songstress channeled the 70s in a pair of whimsical striped platform boots hailing from Jeffrey Campbell.