Potpourri

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Across
  1. 2. Calm and peaceful, of a lake
  2. 4. German composer Pachelbel's first name
  3. 6. 2020 Summer Olympics host
  4. 7. Cheerful and jolly
  5. 12. ___ Ave., first property after GO in Monopoly
  6. 13. Oval citrus fruit
  7. 14. Italian stuffed pasta
  8. 15. Laszlo Carreidas' assistant, in the Tintin comic book series
  9. 16. South America's smallest country
  10. 18. Tree from Dr. Seuss' "The Lorax"
Down
  1. 1. The study of the human nose
  2. 2. Journey singer Steve
  3. 3. "Meet The Parents" and "Along Came Polly" star
  4. 5. Inventor of the movie camera
  5. 6. #1 best-selling album of all time, with over 120 million copies sold
  6. 8. Harmless
  7. 9. Body of water that anyone can float in due to its natural buoyancy
  8. 10. Hunchbacked servant from Mel Brooks' "Young Frankenstein"
  9. 11. Home of the EU Headquarters
  10. 17. 27th U.S. President