Helen Folasade Adu Listen^ⓘCBE (Yoruba: Fọláṣadé Adú [fɔ̄láʃādé ādú]; born 16 January 1959), known professionally as Sade (/ˈʃɑːdeɪ/ SHAH-day or /ʃɑːˈdeɪ/ shah-DAY) or Sade Adu, is a Nigerian-British singer-songwriter. She is the principal songwriter and lead vocalist of the band Sade. One of the most successful British female artists in history, she is often recognised as an influence on contemporary music. Her success in the music industry was recognised with the honour Officer of the Order of the British Empire in the 2002 New Year Honours, and she was made Commander in the 2017 Birthday Honours.

Sade was born in Ibadan, Nigeria, and was brought up in England from the age of four. She studied at Saint Martin's School of Art in London and gained modest recognition as a fashion designer and part-time model before joining the band Pride in the early 1980s. After gaining attention as a performer, she formed the band Sade, and secured a recording contract with Epic Records in 1983. A year later, the band released the album Diamond Life, which became one of the era's best-selling albums and the best-selling debut by a British female vocalist.

In July 1985, Sade was among the performers at the Live Aid charity concert at Wembley Stadium and in November the band released their second album, Promise. The next year, she appeared in the film Absolute Beginners. The band released their third album (Stronger Than Pride) in 1988, and a fourth album (Love Deluxe) in 1992. The band went on hiatus in 1996 after the birth of Sade's child.

The band reunited in 1999 and the following year, released Lovers Rock, their first album in eight years. Lovers Rock was a departure from the band's earlier jazz-inspired sounds. In 2010, the band released Soldier of Love, their sixth studio album, and toured arenas worldwide. Since that tour ended in 2011, the band has released three songs: "Flower of the Universe" for the soundtrack of Disney's A Wrinkle in Time, "The Big Unknown", part of the soundtrack of Steve McQueen's film Widows, and "Young Lion", part of the Red Hot compilation album TRAИƧA in 2024. In 2026, she and her bandmates will be inducted into the Rock and Roll Hall of Fame.

Helen Folasade Adu was born on 16 January 1959 in Colonial Nigerian city of Ibadan, in what is now located in Oyo State, Nigeria. Her middle name, Folasade, means "crowned with wealth" in Yoruba. Her parents are Adebisi Adu, a Nigerian lecturer in economics of Yoruba background from Ikere-Ekiti, and Anne Hayes, an English district nurse; they met in London, married in 1955, and moved to Nigeria later. Sade was four years old when her parents separated. Hayes returned to England with Sade and her elder brother, Banji Adu, to live with their maternal grandparents near Colchester, Essex. At age 11, Sade moved to Holland-on-Sea with her mother and brother. After completing her education at Clacton County High School and Colchester Institute at the age of 18, she moved to London and studied fashion design at Saint Martin's School of Art.

After completing a three-year course in fashion design, and later modelling briefly, Sade began backup singing with British band Pride. During this time, she formed a songwriting partnership with Pride's guitarist/saxophonist Stuart Matthewman; together, backed by Pride's rhythm section, they began doing their own sets at Pride gigs. Her solo performances of the song "Smooth Operator", co-written with Ray St. John, attracted record companies' attention, and in 1983 Sade and Matthewman split from Pride, along with keyboardist Andrew Hale, bassist Paul Denman, and drummer Paul Cook, to form what became the Sade band. By the time they performed their first show at London's Heaven nightclub, Sade herself had become so popular that 1,000 people were turned away at the door. In May 1983, Sade performed their first US show at New York City's Danceteria nightclub. On 18 October 1983, Adu signed with Epic Records, with the rest of the band signing in the next year.

Following the record deal, the group began recording their debut album, Diamond Life, which took six weeks to record and was recorded entirely at The Power Plant in London. Diamond Life was released on 16 July 1984, reached number two in the UK Album Chart, sold over 1.2 million copies in the UK, and won the Brit Award for Best British Album in 1985. The album was also a hit internationally, reaching number one in several countries and the top ten in the US, where it sold in excess of four million copies. Diamond Life had international sales of over six million copies, becoming one of the top-selling debut recordings of the '80s, and the best-selling debut ever by a British female vocalist and female-fronted group.

"Your Love Is King" was released as the album's lead single on 25 February 1984 and was a success in European territories, charting at number seven in Ireland and number six on the UK singles chart. The song was less successful in the US, where it peaked at number 54 on the US Billboard Hot 100. The third single, "Smooth Operator", was released on 15 September 1984 and became the most successful song in the US from the album Diamond Life. The track peaked at number five on the US Billboard Hot 100 and the US Billboard Hot Black Singles, as well as peaking at number one on the US Billboard Adult Contemporary chart. In Europe the song fared well, peaking at number 19 in the UK, and reaching the top 20 on the Austrian, Swiss, French, and West German charts.