Although this aired in the 4th season, it was the final Christmas-themed episode of the series. A Christmas episode was skipped in the 5th season to accommodate ongoing plotlines, and the 3 additional seasons aired in the spring/fall, not near Christmastime.
Although the major subplot, about the squad participating in a singing competition against the MTA, revolves around the members of the squad being poor singers, Stephanie Beatriz, who plays Rosa, is a very talented singer in real life, as evidenced by her starring role in the Disney musical Encanto (2021).