Alfie Boe Ramin Karimloo Andrew Lloyd Webber Adam Pascal Anthony Rapp Elaine Paige Sierra Boggess El Divo Vittorio Grigolo Talk Dirty The Cerny Brothers Renee Fleming Fukuyama Idina Menzel Mandy Patinkin Apache Holly Cole Trio David Arnold Jason Robert Brown Rachel Tucker Wintley Phipps Sonic Mayhem Najwajean Emma Shapplin Canadian Tenors Tim Burton The Tenors Eden Espinosa Elizabeth South Sonic Gentri Don Davis Chris Mann The Phantom Of The Opera Wende Snijders Sky Steven Sondheim Susan Boyle Joseph Habedank Gardar Thor Cortes Selectracks Kristen Chenoweth Hugh Panaro Stephen Schwartz Megan Hilty Josh Groban Gregorian Chant Stephen Sondheim Richard Rodgers