I doubt it's just dancers. It's possible for there to be both singers AND dancers doing the tribute...
ANTICIPATED UPCOMING RELEASES
Ariana Grande, My Everything |August 24
My Brightest Diamond, ThIs is My Hand |September 16
The Juan Maclean, In a Dream |September 16
alt-J, This Is All Yours |September 22
Perfume Genius, Too Bright |September 23 ok west