Serenata   is an elegant song bt Leroy Anderson ( Blue Tango, Belle of the Ball ,sleigh Ride) all introduced by the Boston Pops. The lyrics were by Mitchell Parrish who wrote a number of songs with Hoagy Carmicheal  ( Stardust, Stars Fell on Alabama and Sophisticated Lasdy with Duke Ellington. This version is sung by Nat Cole accompanid by another great piano player George Shearing.

 https://youtu.be/RLcz_C-K4mI