Listen to It Must Be Love online. It Must Be Love is an English language song and is sung by B. A. Rolfe and his Lucky Strike Orchestra. It Must Be Love, from the album The Great 1920s & Swingin' Gatsby 20s Classics - 100 Classic Speakeasy Jazz Hits from the Gatsby Inspired Roaring Twenties, was released in the year 2013. The duration of the song is 3:32. Download English songs online from JioSaavn.