A backing vocalist or backing singer (or, especially in the U.S., backup singer or sometimes background singer or harmony vocalist) is a singer who provides vocal harmony with the lead vocalist or other backing vocalists. In some cases, a backing singer may sing alone as a lead-in to the main vocalist's entry or a counter-melody. While some bands use performers whose sole on-stage role is performing backing vocals, it is common for backup singers to have other roles. In many rock and metal bands, the musicians doing backup vocals also play instruments, such as guitar, electric bass, drums, or keyboards. In Latin or Afro-Cuban groups, backup singers may play percussion instruments or shakers while singing. In some pop and hip-hop groups and in musical theater, the backup singers may be required to perform elaborately-choreographed dance routines while they sing through headset microphones.

Robert Peter "Robbie" Williams (born 13 February 1974) is an English singer-songwriter, vocal coach and occasional actor. He is a member of the pop group Take That.

Williams rose to fame in the band's first run in the early- to mid-1990s. After many disagreements with the management and certain group members, Williams left the group in 1995 to launch his solo career. On 15 July 2010, it was announced he had rejoined Take That and that the group intended to release a new album in November 2010 which became the second fastest-selling album of all-time in UK chart history and the fastest-selling record of the century.

Williams has sold over 70 million records worldwide, which ranks him among the best-selling music artists worldwide. He is the best-selling British solo artist in the United Kingdom and the best selling non-Latino artist in Latin America. Six of his albums are among the top 100 biggest-selling albums in the United Kingdom. He has also been honoured with seventeen BRIT Awards—more than any other artist—and seven ECHO Awards. In 2004, he was inducted into the UK Music Hall of Fame after being voted as the "Greatest Artist of the 1990s."

Kandace Lindsey (born March 20) is an American singer-songwriter.

Kandace Lindsey was born in Phoenix, Arizona. She works in the genres of rock, soul, Funk, with a twist of world. Lindsey has an upcoming CD titled Acoustic Fire. Her influences include Seal, Corinne Bailey Rae and Tina Turner.

Lindsey is a bilingual vocalist. She was already a session pro when she got her big start by singing a duet called Ahora quien with Marc Anthony, which resulted in embarking on several worldwide tours with Anthony, and also with Jennifer Lopez.

Lindsey can be heard at Coffee Bean & Tea Leaf, Verizon Wireless, DKNY and Steve Madden stores. Her voice can be recognized in commercial spots for retailers including Nike, Budweiser, Walmart, and Curves Women's Gym. Both her voice and her original recording of "Phoenix Will Fly" have been used as the theme song for the WNBA team, the Phoenix Mercury for all their home games, in half time performances for the NBA’s Phoenix Suns as well as the NBA Entertainment League Celebrity Game. She has been seen as a performer on The Oprah Winfrey Show, Saturday Night Live and The Tonight Show with Jay Leno.

Wendy Joan Matthews (born 1960) is an Australian adult alternative pop singer originally from Canada who has been a member of Models and Absent Friends and is a solo artist. She released Top 20 hit singles in the 1990s including "Token Angels", "Let's Kiss (Like Angels Do)", "The Day You Went Away" and "Friday's Child" with Top 20 albums, You've Always Got the Blues (duet album with Kate Ceberano), Émigré, Lily, The Witness Tree and her compilation, Stepping Stones. She has won six Australian Recording Industry Association (ARIA) Awards. According to rock music historian, Ian McFarlane she provides "extraordinary, crystal-clear vocals [...] a soulfulness that was the mark of a truly gifted singer".

Matthews appeared on three series of It Takes Two—an Australian TV celebrity singing competition—partnered with Richard Champion (2006), Russell Gilbert (2007) and John Mangos (2008). On 27 October 2010, Models were inducted into the ARIA Hall of Fame by Matthews.

Nicki Richards (born Honolulu, Hawaii, USA on March 24) is an American singer, songwriter, producer, actor based in Manhattan, New York City. She is also known as a backing singer for a number of renowned artists and on a big number of studio recordings. Her father was a high ranking African-American naval officer and her mother, Donna Blackmon, a talented singer. Nicki's brother, Philip Richards is a singer / musician in his own right and collaborated with her in her works.

Nicki Richards had her first public appearances in commercials when she was only 5. She had her break when she won the Grand Prize on the singing competition Star Search. She consequently recorded and performed for the past several years with Madonna, (including both Confessions Tour, Sticky & Sweet Tour and MDNA Tour), Mariah Carey, Whitney Houston, Mick Jagger, Michael Jackson, Tina Turner, Gloria Estefan, Celine Dion, Stevie Wonder, Linda Ronstadt, Mary J. Blige, Missy Elliott, Lenny Kravitz, Anastacia, Bette Midler, Maxi Priest, Al Green, and many more.