Tessa Margaret Niles (née Webb; born 27 January 1961 in Ilford, Essex) is an English singer, best known as a backing singer for a wide variety of contemporary artists. She began her professional singing career in 1979.

Niles began her professional singing career, as both a lead and a backing vocalist, in 1979. Throughout her career, Niles has worked with many artists including ABC, Eric Clapton, Kiri Te Kanawa, The Rolling Stones, Annie Lennox, Tears For Fears, Duran Duran, Kylie Minogue, David Bowie, The Police, Take That, Grace Jones, Tina Turner, Paul McCartney, George Harrison, Steve Winwood, Morrissey–Mullen, Snowy White, Tom Jones, Marillion, Fish, Pet Shop Boys, Buddy Guy, B*Witched, Victoria Beckham, Nick Carter, Living in a Box, Cliff Richard, Mike + The Mechanics, Zucchero, Status Quo, Robbie Williams, Bill Sharpe, Gary Numan, Wham!, Andrew Ridgeley, Dusty Springfield, The The, Jimmy Nail, Cher, Cabaret Voltaire, Seal, Liza Minnelli, John Denver and The Escape Club. In the mid-1980s, Niles was featured the lead vocalist (along with Clive Griffin) for the jazz ensemble Bandzilla, which was led by her then-husband Richard Niles.