As a gigantic fundraiser for the World Health Organization during the COVID-19 pandemic, some of the world's biggest stars performed and made fundraising pitches to help eradicate the virus. Pretty epic show. Let's save the best for first. Celine Dion, Lady Gaga, Andrea Bocelli, John Legend, and Lang Lang offer "The Prayer." Lady Gaga Stevie Wonder John Legend and Sam Smith J Lo Taylor Swift Keith Urban Lizzo Hozier Billie Eilish & Finneas David and Victoria Beckham introduce Elton John Rolling Stones Jess Glynne The Killers Lady Antebellum Ellie Goulding Paul McCartney Jessie J Annie and Lola Lennox Billie Joe Armstrong