An important question

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Across
  1. 2. To exist
  2. 3. What someone writes before they die
  3. 6. One of my nicknames for you with a "y" added at the end.
Down
  1. 1. Ariana Grande’s character Cat’s last name on Victorious
  2. 4. ___Tube
  3. 5. Possessive pronoun