Have Yourself A Merry Little Christmas, Puzzle

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Across
  1. 5. Scrooge's infamous response to "Merry Christmas"
  2. 7. Mexican Christmas Eve flower
  3. 9. Nat King Cole roasted these on an open fire
  4. 12. Santa's most electrifying Reindeer
  5. 15. One of Santa's little helpers
  6. 16. Cookie houses that appear around the holidays
  7. 17. Christmas candy shaped like a shepherd's staff
  8. 19. Santa Claus' "KK" alias
  9. 20. Green Who who stole (and returned) Christmas
Down
  1. 1. 24-hour period following Christmas, as per the British
  2. 2. Final evening of the 12 days of Christmas
  3. 3. Merry Christmas en español
  4. 4. Three King's Day
  5. 6. All she wants for Christmas is you
  6. 8. Frosty was one of these creatures
  7. 10. Christmas' Roman predecessor
  8. 11. List of Santa's that gets presents
  9. 13. Color Christmas Bing Crosby sang about
  10. 14. Santa's whip
  11. 18. Santa's preferred entrance into a home