>>93764851with a few exceptions,
Garnet is voiced by Estelle: solo musical artist
Opal was voiced by Aimee Mann: bassist and vocalist for 'Til Tuesday, as well as solo artist
Sugilite was voiced by Nicki Minaj: hip hop pop trash
Sardonyx was voiced by Alexia Khadime: West End theatre star
Stevonni is voiced by AJ Michalka: part of the Aly and AJ duo and also solo artist
Yellow Diamond is voiced by Patti Lupone: Broadway and West End theatre veteran and legend
Blue Diamon is voiced by Lisa Hannigan: member of Damien Rice's band, and solo indie folk artist
but then Malachite and Alexandrite are just all the component characters' actors talking over one another.
And Smokey Quartz was voiced by Natasha Lyonne, who isn't a singer at all