You're not flop, regression is flop (v9)

123456789
Across
  1. 1. The world's cutest K-9
  2. 4. Country where they yell "nein"
  3. 6. Canceled ATP #9
  4. 8. When you're happy, you're on __ nine
  5. 9. Nine inch __; band
Down
  1. 2. Taylor swift was born in nineteen __ nine
  2. 3. Our former 9th planet
  3. 5. Kpop demon hunting WTA #9
  4. 7. Sword-fighting animal with 9 lives