DescriptionRecord, Sinatra: Blue Skies. Tommy Dorsey and his Orchestra. Vocal refrain by Frank Sinatra and Chorus. Victor 27566-A. 78 rpm. 10 inch. (1941.) Tracks A-Side, 27566-A: Blue Skies - Fox Trot B-Side, 27566-B: Back Stage at the Ballet - Fox Trot (Entre Bassidores Durante el Ballet) Recorded July 15, 1941. In printed paper promotional sleeve: Another RCA Victor record. "The Singers' Single Record Series"