Anne-Marie Rose Nicholson (born 7 April 1990) is an English singer and songwriter. She has achieved commercial success with the songs "Alarm" (2016), "Ciao Adios" (2017), "Friends" (2018), "2002" (2018), "Don't Play" (2021), and "Kiss My (Uh-Oh)" (2021), and was featured on Clean Bandit's "Rockabye" (2016), which peaked at number one. She has released 3 albums: Speak Your Mind (2018), which peaked at number three on the UK Albums Chart, Therapy (2021), and Unhealthy (2023), both of which peaked at number two on the UK Albums Chart.

Anne-Marie was nominated for four awards at the 2019 Brit Awards, including Best British Female Solo Artist. To date she has been nominated for ten Brit Awards and has also received a nomination for a Billboard Music Award and a Grammy Award. She has been signed to Asylum Records since 2015. From 2021 to 2023, Anne-Marie appeared as a coach on the television singing competition The Voice UK.

Anne-Marie Rose Nicholson was born on 7 April 1990 in East Tilbury, Essex. Her mother is a local teacher and her father is a builder and handyman from the East End of London. She has an older sister named Samantha.

When she was five, Anne-Marie went to stage school. She appeared in two West End productions as a child: she auditioned for Les Misérables aged six, without telling her parents, and performed in Whistle Down the Wind with Jessie J when she was twelve.

Anne-Marie attended St Clere's School at Stanford-le-Hope, where she was involved in performing arts. Her initial popularity there ended when she was fourteen—she was shunned and bullied by her classmates after being accused of cheating on her boyfriend, when she had only spoken to another boy on the phone late at night. Anne-Marie also said she regrets being a difficult child—exacerbated by her grandmother's death when she was twelve—and was advised by Ed Sheeran to "call [her] mum and dad every day". She began filming herself singing in her room as a teenager. Anne-Marie went on to go to Palmer's College in Thurrock.

Anne-Marie is a black belt in Shotokan karate. She began taking lessons aged nine, and became a triple world champion, winning double gold in the Funakoshi Shotokan Karate Association World Championships in 2002, and further gold and silver in 2007; as well as gold in the United Kingdom Traditional Karate Federation National Championships. She credits karate with teaching her the "discipline and focus" necessary for her singing career, but tours have made it difficult for her to find time for the sport.

After a chance meeting, Anne-Marie secured recording time in Rocket Studios, owned by Elton John, which signed her to a recording contract after hearing her sing. On Rocket, she released the demo "Summer Girl" in 2013. It attracted attention when Ed Sheeran linked to it on his Twitter account. A possible solo career was curtailed for her to develop herself as an artist. After guest appearances on songs by Magnetic Man, Gorgon City, and Raized by Wolves, she gained the attention of Rudimental, and in 2014 she was asked to replace a vocalist who left the band. Anne-Marie then spent two years touring with Rudimental as a vocalist. She also featured on four tracks on their second album We the Generation (2015), including co-features with Dizzee Rascal and Will Heard, and "Rumour Mill", which reached number 67 on the UK Singles Chart and gave her enough confidence to go solo. She said that she was writing daily while touring.

Anne-Marie's debut extended play (EP), Karate EP, was released on 10 June 2015, under Rudimental's then-new label Major Tom's. Produced by Josh Record and Two Inch Records, it contained three tracks and a remix. Debut single "Karate" and "Gemini" led to Anne-Marie making her first solo live performances. The Guardian favorably reviewed "Boy" and opined that Karate "proves she's ready to step out alone". She released the single "Do It Right" in November, which peaked at number 90 on the UK Singles Chart and was certified platinum in Australia.