The impromptu moment happened during the rock band's show in London on Thursday.
The iconic jam band will also perform at Berkeley, California's Greek Theatre and Seattle's Climate Pledge Arena.
This year's event takes place on April 14-16 and April 21-23.
Lil Nas X, Korn, Paramore, Alesso, Three Six Mafia and more on this year's roster.
This is the Foos' first major concert announcement since the death of drummer Taylor Hawkins.
The inaugural Afro Nation Miami 2023 follows the success of the 2022 Afro Nation festivals in Portugal, Puerto Rico & Ghana.
Modest Mouse, Kurt Vile, Band of Horses, Caamp and others on tap for May event in Redondo Beach.
Monday's show, called off on "doctor's orders," was Joel's final concert of 2022.
Being just two days before Eilish's Dec. 18 birthday, Donald Glover wished her a happy birthday with the crowd.
"As a victim of sexual assault, I am endlessly triggered and mindblown," the singer wrote on a since-deleted Instagram Story.
