Solve the crossword to reveal the hidden message!

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Across
  1. 4. Winner of the 2005 Irish Grand National
  2. 7. Originally titled Puss Gets the Boot
  3. 8. Least populated US state
  4. 12. Just like her dad
  5. 13. Occupation of the bubble gum inventor
Down
  1. 1. Solved with a cipher
  2. 2. 2006 movie with main character Mumble
  3. 3. Location of what some call the "flattest 10k in Ireland"
  4. 5. To be cleared, say
  5. 6. Dublin monastery built approx 773 AD
  6. 9. US rock band with estimated 75 million records sold
  7. 10. Official name for strawberry seeds
  8. 11. One of two European cities to host the World Cup final since 2000