Written and first recorded (as “A Little Word”) by Shirley & Lee (1956).
Hit version by Lloyd Price (US #29/R&B #3 1956).
Also recorded by John Lennon (1973/1974).
From the wiki: “‘A Little Word’ was written by Leonard Lee, and released as the B-side to Shirley & Lee’s ‘That’s What I’ll Do’ non-charting single released in February 1956 (ahead of their chart-topping ‘Let the Good Times Roll’). Lloyd Price would adapt ‘A Little Word’ into “Just Because’. Price had already recorded one of the biggest-selling songs of the early Rock ‘n roll era, ‘Lawdy Miss Clawdy’, in 1952, but his career momentum was cut short when he was drafted into the Army in 1954. Upon his discharge, Price found he had been replaced at Specialty Records by Little Richard. Price then decided to start his own label – The Kent Recording Company (KRC). Kent Records began in late 1956 with Price as its only artist. The label’s first release was ‘Just Because’, on which Price played piano and produced the session.