Listen to Swingin On a Rainbow online. Swingin On a Rainbow is an English language song and is sung by Frankie Avalon. Swingin On a Rainbow, from the album Happy Oldie Party Music (Over100Songs, Hits, Sing-A-Longs And Party Cracker), was released in the year 2017. The duration of the song is 1:52. Download English songs online from JioSaavn.