Calificación
Reparto

Joni Mitchell
Self

Brandi Carlile
Self

Celisse
Self

Herbie Hancock
Self

Angélique Kidjo
Self

Diana Krall
Self

Cyndi Lauper
Self

Ledisi
Self

Annie Lennox
Self

Marcus Mumford
Self

Graham Nash
Self

James Taylor
Self

Lucius
Self