David Bowie and Bing Crosby's 1977 duet of "Little Drummer Boy" is a peculiar and awkward holiday pairing, given their contrasting styles and backgrounds. The tension between the two legends is subtly evident in their polite exchange before the surreal and cringy performance. A parody of the exchange by Will Ferrell and John C. Reily adds a humorous twist to the awkwardness.
Source: https://glidemagazine.com/308439/weirdo-wednesday-david-bowie-bing-crosby-will-ferrell-john-c-reilly-do-their-best-little-drummer-boys