“One World: Together at Home,” the two-hour star-studded virtual concert featuring Lady Gaga, Taylor Swift, Jennifer Hudson and numerous other artists, drew in nearly 21 million viewers across the 26 networks on which it aired live on Saturday night, according to Nielsen data.

The musical event, organized by Global Citizen and the World Health Organization, raised $127.9 million for health care workers and coronavirus relief, according to Global Citizen. Over $55 million of the money raised will be donated to the Covid-19 Solidarity Response Fund, while nearly $73 million will go toward local and regional responders.

The Rolling Stones, Billie Eilish, Lizzo, Jennifer Lopez, Keith Urban, Elton John, Stevie Wonder, Shawn Mendes and Camila Cabello numbered among the many artists who performed during the livestreamed concert. Among the 19 separate performances were Lady Gaga’s rendition of Charlie Chaplin’s “Smile,” “Soon You’ll Get Better” from Swift, “Rainbow” from Kacey Musgraves, “Lady Madonna” from Paul McCartney,...