The #1 song in the UK on May 21, 1971

Knock Three Times By Tony Orlando and Dawn

Other #1 songs on May 21, 1971

#1 Hit Song

Joy to the World
Three Dog Night

#1 R&B Song

Bridge Over Troubled Water
Aretha Franklin

#1 Country Song

I Won't Mention It Again
Ray Price

Notable May 21 birthdays in the 1970s

Olga Sosnovska
TV Actress
Born May 21, 1972
Fairuza Balk
Movie Actress
Born May 21, 1974
German Montero
World Music Singer
Born May 21, 1979
Angelo Pintus
Comedian
Born May 21, 1975
Kika Rocha
TV Show Host
Born May 21, 1976
Mikel Jollett
Rock Singer
Born May 21, 1978
Poornima Indrajith
Movie Actress
Born May 21, 1980
Noel Fielding
Comedian
Born May 21, 1973
Kimberly Pressler
Sportscaster
Born May 21, 1977