The world’s biggest pop stars worked together to pull off a unique concert filmed partially via cell phone on Saturday. Dedicated to health workers battling to save lives amid the coronavirus pandemic, the eight-hour long YouTube extravaganza ended in a two-hour long primetime show screened on multiple U.S. television channels. Old timers such as The Beatles star Paul McCartney and The Rolling Stones joined the latest music sensations, from Lizzo, to Taylor Swift and Billie Eilish. Their performances were interspersed with messages of hope, encouragement and advice, with everyone from Beyonce to WHO Director-General Tedros Adhanom Ghebreyesus, UN sec general Amina J. Mohammed and former First Ladies Michelle Obama and Laura Bush speaking out. Show-stopper: Celine Dion, Lady Gaga, Lang Lang, Andrea Bocelli and John Legend gave the show a riveting finale with their take on Dion and Bocelli’s 1999 duet The Prayer A true Legend: John Legend made his second appearance of the night in the show’s grand finale All star lineup: Celine Dion [L] joined the show’s curator and star Lady Gaga [R] for the showstopping finale Lady Gaga dons a classic little black PRISCAVera dress PRISCAVera AW20 Shop the label here… Buy now If there is one failsafe option to…