The Little Drummer Boy / Peace On …

Bing Crosby & David Bowie – The Little Drummer Boy / Peace On Earth
http://www.youtube.com/watch?v=DiXjbI3kRus

see also:
https://franzcalvo.wordpress.com/2013/12/07/pentatonix-little-drummer-boy

Carol of the Drum
by The Three Tenors
http://www.youtube.com/watch?v=_IeV6fy2lLs&feature=player_detailpage#t=770