The album garnered generally positive reviews from music critics. Stephen Thomas Erlewin editor of Allmusic, said: ReJoyce: The Christmas Album, never approaches the old-fashioned manners implied in the title and instead wallows in the big, brassy, over-the-top spectacle of show biz. Rejoyce is a Christmas album that sounds like it was recorded at a Las Vegas revue. It's filled with showstoppers and grandstanding, relying on the tried-and-true seasonal classics while offering a couple of new songs almost as an afterthought. It's bright and incessantly cheerful, always seeming loud even during its quietest moments because the music itself is bold and brassy. While she sounds a little too breathy on occasion, Simpson acquits herself well on the record, and the entire enterprise will surely please her fans, particularly those who like her persona just a little bit better than her singing.
The album debuted on the US Billboard 200 at number sixteen with sales of 152,000 copies sold in its first week. The album later climbed up to number fourteen. As of February 23, 2009, the album has sold a total of 669,000 copies in the United States and has been certified Gold by the Recording Industry Association of America (RIAA).
Simpson's first extended play (EP), titled A Special Limited Edition Christmas Collection, was packaged with the ReJoyce: The Christmas Album deluxe edition that was made available exclusively on her official music store.