Guess the singer by the title of their songs

12345678910
Across
  1. 2. Toxic
  2. 5. Poker Face
  3. 7. Sorry not sorry
  4. 8. Life Goes On
  5. 10. If I can't have you
Down
  1. 1. 7 Rings
  2. 3. New rules
  3. 4. Stay Stay Stay
  4. 6. Havana
  5. 9. Make It Right