A swing chart styled after the Michael Bublé version, arranger Scott Ragsdale nailed it. At 148 BPM, in the key of B-flat modulating to C, the vocal range is from F below middle C to 3rd space C, treble clef. Lead trumpet range is to written A above the staff and there are optional solos instrumental parts for B-flat, E-flat and bass clef instrument in lieu of the vocal. Excellent chart.