Daisy Door (born 30 January 1944 in Duisburg, real name Evelyn van Ophuisen) is a German Schlager music singer.
As a child, Daisy Door sang on Radio Cologne.
Her first recordings were performed with her sister Liane as "Li & Ev (e)"; A solo single was also issued.
In 1971 she became famous as solo singer with the song Du lebst in deiner Welt (Highlights of My Dreams) composed and produced by Peter Thomas then with Als die Blumen Trauer trugen of the TV program Der Kommissar where she lent her voice to the unnamed actress Sylvia Lukan [de].
Daisy Door chose her pseudonym with reference to Doris Day.