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Filmed in New York City at Madison Square Garden, the concert special will feature the singer-songwriter performing a repertoire of Carey's festive holiday hits, including the perennial favorite, "All I Want for Christmas Is You."

How to Watch Mariah Carey: Merry Christmas to All! Legally and Safely

If you want to stream Mariah Carey: Merry Christmas to All! through reputable and legal services, there are a few good options depending on where you are. Subscription platforms like HBO Max, Disney+, Netflix, Amazon Prime Video, and Apple TV+ sometimes carry Mariah Carey: Merry Christmas to All! films or related DC titles—though availability depends on your country.

If you’d rather not commit to a subscription, there are ad‑supported, free (but legal) platforms such as Tubi, Pluto TV, Peacock or Crackle (where available in your region) that occasionally host superhero films.

Lastly, don’t forget about library‑linked streaming options like Kanopy or Hoopla (if your library or university is registered), and official uploads by film distributors on YouTube—these can also give you legal access to classic movies.