- Alfio
- Jonathan Ansell
- Romina Arena
- Krassimir Avramov
- Nikolay Baskov
- Andrea Bocelli [1]
- Neal E. Boyd
- Donald Braswell II
- Sarah Brightman
- Patrizio Buanne
- Charlotte Church
- Malena Ernman
- Sergio Franchi
- Mario Frangoulis
- Giorgia Fumanti
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- Lesley Garrett
- Filippa Giordano
- Alenka Gotar [2]
- Vittorio Grigolo
- Josh Groban
- Katherine Jenkins
- Aled Jones
- Keedie
- Kimera
- Adam Lopez
- Natasha Marsh
- Will Martin
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- John McDermott
- Paul Potts
- Alessandro Safina [3]
- Emma Shapplin
- Sissel
- Faryl Smith
- Tarja Turunen
- Yulia Townsend
- Roy Tugbang
- Vitas
- Rufus Wainwright
- Russell Watson
- Hayley Westenra
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