Hark, The Herald Angels Sing

Here's a quick -- less than two minutes -- swing treatment of Felix Mendelssohn's composition, with inspiration and a couple of licks from Frank Comstock's big-band arrangement "Yo, Hark! Those Angels Swing." Comstock's best-known work is probably the music from the old Rocky and Bullwinkle cartoons -- which is actually spectacular stuff.
Score and parts are available for a modest price at halleonard.com. Search on my name (Will Corbin) for the entire collection.