Co-written and first recorded (as “All My Love (Oh Boy)”) by Sonny West (1957).
Hit versions by Buddy Holly (US #10/R&B #13/UK #3 1957), Mud (UK #1 1970).
From the wiki: “‘Oh Boy!’ was written by Sonny West, Bill Tilghman and Norman Petty, and was originally recorded by West in 1957 but failed to achieve any commercial success. It was recorded again later in 1957 by Buddy Holly & The Crickets, with Holly singing lead vocals, and achieved success on both the Pop and R&B charts in the US and the UK Singles chart. British band Mud charted the song to UK #1 with their 1970 cover recording.”
Buddy Holly, “Oh Boy!” (1957):
Mud, “Oh, Boy!” (1970):