Bonkers' Birthday Puzzle

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Across
  1. 2. Which famous English writer died on their birthday at the age of 52? (7,11)
  2. 8. Jewish boys have a bar mitzvah on which age birthday? (8)
  3. 11. This is what you are if you are wearing your 'birthday suit'. (5)
  4. 13. Who received a diary for their 13th birthday that would later become world famous? (4,5)
  5. 14. What does Andy receive for a birthday present in Toy Story? (4,9)
  6. 16. Who famously sang "Happy Birthday, Mr. President", to President John F. Kennedy at a celebration of his 45th birthday on May 19, 1962? (7,6)
  7. 17. If you are this thoroughbred animal and you are born in the Northern Hemisphere, January 1 is your official birthday no matter the real day of your birth. (5)
Down
  1. 1. Don't bug out, but this music icon's Birth Certificate was auctioned in March 1997, for US $84,146. (4,9)
  2. 3. People in which country do not celebrate birthdays on July 8 and December 17? (5,5)
  3. 4. Originally, the Happy Birthday song was written in 1893 for use in Kindergartens. What was it called? (4,7,2,3)
  4. 5. Which fictional character in literature celebrates an 'eleventy-first' birthday? (5,7)
  5. 6. Who wrote, produced and performed the 1981 single 'Happy Birthday'? (6,6)
  6. 7. In the 19th and early 20th century, these were a popular gift for a person on their 21st birthday. (5,5)
  7. 9. 'It's My Birthday' topped the charts in the United Kingdom in 2014 for American singer Cody Wise and which Black Eyed Peas recording artist? (4.1.2)
  8. 10. People born on Christmas Day have this zodiac sign. (9)
  9. 12. Queen Elizabeth II celebrates her 'real' birthday in which month? (5)
  10. 15. This children's author, who is famous for stories about a top-hat wearing cat, also wrote a book called 'Happy Birthday to You!' (2,5)