"Opus No. 1" is a popular song, composed in 1943 by Sy Oliver, with lyrics by Sid Garris.
Opus Dei | Mr. Holland's Opus | Opus number | opus number | Opus the Penguin | Opus III | Opus | XS: The Opera Opus | Requiem (Opus 9)". | Opus sacerdotale Amici Israel | Opus No. 1 (1943 song) | Opus Eponymous | Opus (codec) | Opus Avantra | Opus 69 | Opus 40 | Mr. Holland’s Opus | L'Opus Dei : enquête sur le "monstre" |
The instrumental was a medley of swing jazz hits - "In the Mood", "Cherokee", "American Patrol", "Sing, Sing, Sing", "Don't Be That Way", "Little Brown Jug", "Opus #1", "Zing Went the Strings of My Heart", and "String of Pearls" - that became so popular it even cracked the US Billboard Pop Singles chart (at #31) and Adult Contemporary chart (#20).