Carnival!

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Across
  1. 5. confetti
  2. 7. sequens
  3. 9. music
  4. 11. mask
  5. 12. parade
Down
  1. 1. fireworks
  2. 2. costume
  3. 3. streamers
  4. 4. carnival
  5. 6. flags
  6. 8. samba
  7. 10. balloons