Sophie Michelle Ellis-Bextor (born 10 April 1979) is an English singer and songwriter. She first came to prominence in the late 1990s as the lead singer of the indie rock band Theaudience. After the group disbanded, Ellis-Bextor went solo and achieved success beginning in the early 2000s. Her music is mainstream pop and dance with influences of disco, nu-disco, and 1980s electronic music.

In 2000, Ellis-Bextor collaborated with Italian DJ Spiller on "Groovejet (If This Ain't Love)", which reached number one in the United Kingdom and in 2015 became the UK's biggest-selling vinyl single of the millennium so far. Her debut solo album, Read My Lips, was released in 2001 and peaked at number two on the UK Albums Chart. It was certified double platinum by the BPI, and sold 1.5 million copies worldwide. Three of its four singles—the Cher cover "Take Me Home", "Murder on the Dancefloor", and double A-side "Get Over You" / "Move This Mountain"—reached top three in the UK. Its follow-up Shoot from the Hip (2003) reached number 19 in the UK and spawned two top ten singles, "Mixed Up World" and "I Won't Change You".

Ellis-Bextor's third studio album, Trip the Light Fantastic (2007), peaked at number seven in the UK and its lead single "Catch You" reached the top ten. Her fourth studio album, Make a Scene (2011), and its third single "Bittersweet" achieved top 40 positions in the UK. Her fifth studio album, Wanderlust (2014), peaked at number four. In 2016, she released a Latin-inspired sixth studio album, Familia, to critical acclaim.