FEMALES
- Adele
- Amy Lee (Lead singer Evanescence)
- Ane Brun
- Anji Bee (lead singer Lovespirals)
- Billie Holiday
- Dinah Washington
- Ella Fitzgerald
- Emily Barker (Emily Barker & The Red Clay Halo)
- Etta James
- Janis Joplin
- Kay Starr
- Lena Horne
- Sarah Jarosz
- Stevie Nicks
MALES
- Amos Lee
- Andrew McMahon (Lead singer Something Corporate/Jack’s Mannequin)
- Brandon Boyd (Lead singer Incubus)
- Darren Hayes
- Eli Mattson
- Elton John
- Glen Hansard
- Gregory Alan Isakov
- Jason Mraz
- John Rzeznik (Lead singer Goo Goo Dolls)
- Josh Franceschi (Lead singer You Me at Six)
- Justin Ringle (Lead singer for Horse Feathers)
- Mel Tormé
- Michael Bolton
- Patrick Stump
oct 23 2010 ∞
sep 9 2012 +