Tony Bennett

Self

Alec Baldwin

Self

Andrea Bocelli

Self

Michael Bublé

Self

Lady Gaga

Self

Billy Joel

Self

Elton John

Self

Diana Krall

Self

K.D. Lang

Self

Wynton Marsalis

Self

Leslie Odom Jr.

Self

Rufus Wainwright

Self

Stevie Wonder

Self

Steve Buscemi

Self

Dan Castellaneta

Homer Simpson (voice)

Jerry Foley