Sisse Marie Holzmann Søby (born in Aalborg, November 21, 1985) is a Danish singer, model, TV hostess and songwriter.
In 2001 she won the most prestigious song contest for young people on Danish national television, which led to a gold certified album. The following year she received a Grammy for Best Teen Album. Since then, she worked as a model in Milan, London, Atlanta, Copenhagen, Oslo, Munich, Amsterdam, Istanbul and Stockholm. She has done model photos, catalogues and billboards for Tiffany Bridal, O'Neill, Heineken, Volvo, Citroën and Wonderbra. She has done photo series and covers of Cosmopolitan, T3, Ché and Marie Claire and runway for Italian Vogue.