Wokaliści:
- Waters, Gilmour, Barret (Pink Floyd)
- Jus Oborn (Electric Wizard)
- Devin Townsend (Devin Townsend, SYL, The Devin Townsend Band)
- Anthony Kiedis, John Frusciante (RHCP, JF)
- Greg Puciato (The Dillinger Escape Plan)
- Nergal (Behemoth)
- Lars Göran Petrov (Entombed)
- Karl Sanders (Nile)
- Scott Kelly (Neurosis)
- Tom Araya (Slayer)
Wokalistki:
- Bjork
- Verity Susman i Mia Clarke (Electrelane)
- Regina Spektor
- Natalie Imbruglia
- Nelly Furtado
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