Yvonne John Lewis (occasionally spelled Yvonne John-Lewis) is a female lead and backing singer from the United Kingdom. She is currently teaching mathematics at a secondary school in North London.
Hailing from London, she was discovered by Osmond Wright, better known by his stage name "Mozez" and a singer for British downtempo group Zero 7.
John Lewis first featured as a lead vocalist on Zero 7's albums, and has gone on to provide lead vocals for and been featured on recordings by artists including as Basement Jaxx, Sia, Stella Browne, Narcotic Thrust and Rollercone. She is well known as the featured singer on Narcotic Thrust's number one Billboard Hot Dance Music/Club Play hit from 2002, Safe from Harm.
John Lewis has worked as a backing vocalist for artists like Bryan Ferry, Blue, Enrique Iglesias, James Fargas, Westlife and Atomic Kitten. She also provided the vocal sample in Simon Webbe's track, "No Worries". She toured with Roxy Music in 2004.