Blossom Dearie (April 28, 1924 – February 7, 2009) was an American jazz singer and pianist, often performing in the bebop genre and remembered for her girlish voice.

Blossom Dearie was born on April 28, 1924, in East Durham, New York to a father of Irish-Scottish descent and a mother of Scandinavian descent. Different sources state her given names variously as Blossom Margrete, Marguerite Blossom, or Margrethe Blossom. As a child she studied Western classical piano but switched to jazz in her teens. After high school Dearie moved to New York City to pursue a music career and began to sing in groups such as the Blue Flames (with the Woody Herman Orchestra) and the Blue Reys (with Alvino Rey's band) before starting her solo career.

She moved to Paris in 1952 and formed a vocal group, the Blue Stars of Paris, which included Michel Legrand's sister, Christiane Legrand, and Bob Dorough. In 1954 the group had a hit in France with a French-language version of "Lullaby of Birdland". The Blue Stars would later evolve into the Swingle Singers. While in Paris she met her future husband, the Belgian flutist and saxophonist Bobby Jaspar. On her first solo album, released two years later, she plays the piano but does not sing.

One of her most famous songs from that period is "The Riviera", which was written and composed by Cy Coleman and Joseph McCarthy Jr. in 1956.