“Anora” took home five statues on Oscar night, but the unofficial award for best one-off collaboration surely would have gone to a live performance from #EltonJohn and #ChappellRoan. The artists came together Sunday at John’s 33rd Annual AIDS Foundation Academy Awards Viewing Party at West Hollywood Park. The event raised over $8.6 million to help end AIDS. Attendees included #MachineGunKelly, #MeganTheeStallion, #BrandiCarlile, #CamilaCabello, #HeidiKlum, #JeanSmart, #NeilPatrickHarris, #SherylLeeRalph, #JuliaFox, #MariaBakalova, #NikkiGlaser, #WaltonGoggins and #ZooeyDeschanel. Together, Roan and John performed duet renditions of the latter’s “Don’t Let the Sun Go Down on Me” and the former’s 2024 hit “Pink Pony Club.” John, who has previously won two Best Original Song Oscars for his “Lion King” ballad “Can You Feel the Love Tonight” and “Rocketman” anthem “I’m Gonna Love Me Again,” posted a clip Monday on Instagram of his and Roan’s performance of “Don’t Let the Sun Go Down on Me...