Margrethe Blossom Dearie (April 28, 1924 – February 7, 2009) was an American jazz singer and pianist. She had a distinctive light and girlish voice. Dearie performed regular engagements in London and New York City over many years and collaborated with many musicians, including Johnny Mercer, Miles Davis, Jack Segal, Johnny Mandel, Duncan Lamont, Bob Dorough, Dave Frishberg, and Jay Berliner.