The British rock icon will lead the artists, performing from his own home for the Fox Presents the iHeart Living Room Concert for America on Sunday night (March 29) - the same day the cancelled iHeartRadio Music Awards were set to be broadcast.
Mariah Carey, Alicia Keys, Billie Eilish, the Backstreet Boys, Tim McGraw, and Green Day's Billie Joe Armstrong were among the first wave of musicians unveiled on Wednesday, and on Friday, Dave Grohl, Sam Smith, Camila Cabello, Demi Lovato, Lizzo, H.E.R., and Ciara added their names to the hour-long event.
Now Elton's close friend GaGa has also signed up to make an appearance, as have DeGeneres, "The Hangover"'s Ken Jeong, actress Melissa McCarthy and her filmmaker husband Ben Falcone, and TV personality Ryan Seacrest.
During the event, the stars will salute first responders and other essential members of the workforce putting their lives on the line to help others during the coronavirus crisis.
Viewers will be encouraged to donate to Feeding America and the First Responders Children's Foundation as Elton and his famous friends belt out their hits from 9 P.M. EST.