- Ren
- Rita Wilson
- The Manhattan Transfer
- Nancy Sinatra
- DL Down3r
- Polina Gagarina
- Michael Bublé
- Michael Ball
- Shirley Bassey
- The Rat Pack
- BYU Vocal Point
- Norah Jones
- Lolita
- Sixpence None the Richer
- Human Nature
- Tony Bennett
- Natalie Cole
- Lisa Stansfield
- Skott
- Harry Connick, Jr.
- Andreya Triana
- Bryn Terfel
- Anna Maria Alberghetti
- ERA
- Ada Ehi
- Orla Gartland
- Alfie Boe
- Tones And I
- Ricardo Montaner
- The Four Aces
- Josh Groban
- Charlotte Cardin
- AURORA
- Theuns Jordaan
- Judy Garland
- Frankie Avalon
- Mike Strickland
- Jimmy Somerville
- Yanni
- Kristin Chenoweth
- All-4-One
- Mark Vincent
- Kristian Kostov
- Diana Krall
- Katrina (Katrina and the Waves)
- Guy Sebastian
- Celtic Thunder
- Andreea Banica
- Madeleine Peyroux
- Shani
- Pat Boone
- Al Martino
- G Flip
- Yanni Voices
- Mzansi Youth Choir
- Alana Davis
- Mario Frangoulis
- k.d. lang
- Dima Bilan
- Kiko Loureiro
- Dmitriy Malikov
- Bobby McFerrin
- Faryl Smith
- DCappella
- Petite Meller
- Patti Page
- Hayley Westenra
- Danny Aiello
- Holly Stell
- Emma Blackery
- Chubby Checker
- Neal E. Boyd
- Isak Danielson
- The Canadian Tenors
- Beth Rowley
- Dance to Tipperary
- Lucy Woodward
- Nat "King" Cole
- Rosemary Clooney
- Eddie Fisher
- Gino Vannelli
- Johnny Drille
- Jonathan Antoine
- Chenoa
- Liza Minnelli
- Jasmine Rae
- Peter Hollens
- Shulem
- The Chad Mitchell Trio
- Larry Gatlin & The Gatlin Brothers
- Lizz Wright
- Nyusha
- Maddi Jane
- Kensington Moore
- Shana Halligan
- Lisbeth Scott
- Il Divo
- Pearl Bailey
- Tony Carreira