The #1 song in the UK on April 21, 1977

Knowing Me, Knowing You By ABBA

Other #1 songs on April 21, 1977

#1 Hit Song

Don't Leave Me This Way
Thelma Houston

#1 R&B Song

The Pride (Part 1)
The Isley Brothers

#1 Country Song

She's Got You
Loretta Lynn

#1 Dance Track

Do What You Wanna Do
T-Connection

Notable April 21 birthdays in the 1970s

Michael Turner

Born April 21, 1971
Rob Riggle

Born April 21, 1970