"He's So Fine" is a song written by Ronald Mack. It was recorded by The Chiffons who topped the Billboard Hot 100 for four weeks in the spring of 1963. One of the most instantly recognizable Golden Oldies with its doo-lang doo-lang doo-lang background vocal, "He's So Fine" is also renowned as the plaintiff song in the now-infamous plagiarism case against George Harrison's "My Sweet Lord".

Country music singer Jody Miller scored a Top Ten hit of her own in 1971 with her cover of "He's So Fine".

"He's So Fine" was written by Ronald Mack, an acquaintance of the Chiffons' members who set himself up as their manager after overhearing them harmonise in their high school's lunch room. Mack elicited the interest of Bright Tunes Corporation, a production company run by the Tokens, who produced the Chiffons singing "He's So Fine", and two other Mack compositions at Capitol Recording Studios.

The Tokens themselves – who had never previously played on a recording session – provided the instrumentation, with the services of drummer Gary Chester.

Originally, "Oh, My Lover", one of the two other songs, was considered the potential hit but the completed track for "He's So Fine" with its now-classic 'Doo-lang doo-lang doo-lang' background vocal - the suggestion of the session's sound engineer Johnny Cue – seemed an obvious smash, although Capitol Records for whom the Tokens were house producers rejected the track: Jay Siegal of the Tokens would recall Capitol president Voyle Gilmore dismissing the track as "too trite...too simple". The Tokens shopped "He's So Fine" to ten labels before placing it with Laurie Records. Siegal; "We played it ,and they locked the doors and said, 'You're not getting out of here. We want that record.' . . . Of course, we'd already been turned down by ten companies. Give us eighty cents and we'd have given you the record."

The Chiffons' 2 later Top 10 hits both contain echoes of "He's So Fine", although neither song was written by Ronald Mack, who died soon after the Chiffons had recorded his song. "One Fine Day" was written by Carole King and Gerry Goffin who'd had Little Eva record the song before shopping it to the Chiffons, after the group hit with "He's So Fine", and "Sweet Talking Guy" – in which the background vocalists sing "he's so fine" – was co-written by the co-founder of Laurie Records, Eliot Greenberg. After the Chiffons had hit with "He's So Fine" and "One Fine Day"¹, the Tokens especially wrote the song "A Love So Fine" to be their next single: it managed a #40 peak.

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