Taylor SwiftJennifer Lopez, Celine Dion, and Sam Smith have answered Lady Gaga’s call to join the line-up of stars for the One World: Together At Home concert extravaganza.

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Gaga is curating Saturday’s (April 18, 2020) two-hour global TV special, arranged in partnership with officials from Global Citizen and the World Health Organization, and had already secured remote appearances by Paul McCartney, Elton John, Chris Martin, Lizzo, Billie Eilish, John Legend, Kacey Musgraves, and Keith Urban, among many others.

Now she has added Swift, Lopez, Dion, and Smith to the bill, alongside Alicia Keys, Usher, Pharrell Williams, and pop couple Shawn Mendes and Camila Cabello.

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Also making cameos during the broadcast will be Oprah Winfrey, Ellen DeGeneres, Matthew McConaughey, Victoria Beckham, Lupita Nyong’o, LL Cool J, Amy Poehler, and Awkwafina.

One World: Together At Home, co-hosted by comedians Stephen ColbertJimmy Kimmel, and Jimmy Fallon, will air simultaneously across the main U.S. TV networks from 8:00 pm EST, and be live-streamed on various digital platforms, as well as the Global Citizen Instagram pages.

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Global Citizen bosses are also putting on a six-hour preshow streaming event from 2:00pm EST on Saturday, with artists like John Legend, Jennifer Hudson, Sheryl Crow, Lady Antebellum, Charlie Puth, Hozier, Michael Buble, Annie Lennox, Common, The Killers, Luis Fonsi, Adam Lambert, and new mom Maren Morris set to join in from isolation.

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Others participating in the lead up to the main gig include Samuel L. Jackson, Sarah Jessica Parker, Liam Payne, Niall Horan, Don Cheadle, Rita Ora, Ellie Goulding, Kesha, Heidi Klum, Billy Ray Cyrus, James McAvoy, Jessie J, and Becky G.