Scott played all the live drums (even the Casio drums, which he did, in fact, "play" as well). Scott also sang all the vocals on Oh Holy Night and White Christmas. The rest of the songs feature harmony vocals that were recorded live. I did all the vocals on Little Drummer Boy. Scott played bass guitar on all the tracks that feature live drums, except Mr. Grinch. I played bass guitar on Mr. Grinch and all the tracks that have either Casio drums, hand percussion (e.g. Oh Holy Night), or either live drum kit or no drums whatsoever, with the exception of the tracks that have no bass guitar whatsoever (i.e. Santa Claus is Coming to Town). I played all the guitars. Everything else, including the xylophone, were divided pretty much evenly between Scott and I.