The triplets

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Across
  1. 4. dad
  2. 5. afraid of being alone
  3. 6. middle
  4. 8. afraid of elevators
  5. 10. guy best friend
  6. 13. hometown
  7. 14. LA mom
  8. 16. tour name
  9. 18. loves pepsi
  10. 19. their "little sister"
  11. 20. top three cheeses
Down
  1. 1. youngest
  2. 2. older brother
  3. 3. intro song
  4. 7. birthday
  5. 9. mom
  6. 11. their dog
  7. 12. afraid of birds
  8. 15. old friend
  9. 17. oldest