Brittany Marie Amaradio (born 1993),[1] known professionally as Delacey, is an American singer and songwriter.

[2] 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),[2][3][4] in March 2020, she released her debut album, Black Coffee.

"[6][7] 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.

Amaradio was born in an Italian family[12] and raised in San Juan Capistrano in Orange County, California.

[13] Picking up the piano and songwriting at seven years old, Amaradio cites her early influences as Stevie Nicks and Billie Holiday, a taste she acquired from her father's vinyl collection.