Brittany Marie Amaradio (born 1993), known professionally as Delacey, is an American singer and songwriter. Having co-written songs such as "New York City" for The Chainsmokers, "Ruin the Friendship" for Demi Lovato, and "Without Me" for Halsey (which reached number one on the Billboard Hot 100), in March 2020, she released her debut album, Black Coffee. She released her second album The Girl Has A Dream in 2023 featuring the single "Boy With The Blues."

In 2024, Delacey co-wrote two songs for the animated motion picture The Wild Robot, "Kiss the Sky" and "Even When I'm Not" both performed by Maren Morris. "Kiss the Sky" was met with critical acclaim, winning a Hollywood Music In Media Award for Best Original Song, and earning nominations for the Astra Awards, Critics' Choice Awards, and Golden Globe Awards.