Identify the Person's Stage Name by their Real One

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Across
  1. 4. Edda van Heemstra Hepburn-Ruston
  2. 6. Alicia Augello Cook
  3. 9. Harry Lillis Crosby
  4. 12. Peter Hernandez
  5. 15. Thomas Cruise Mapother IV
  6. 17. Marion Michael Morrison
  7. 18. George
Down
  1. 1. Destiny Hope Cyrus
  2. 2. Billie O'Connell
  3. 3. Frances Ethel Gumm
  4. 5. Stefani Germanotta
  5. 7. Aubrey Drake Graham
  6. 8. Emilie
  7. 10. Natalia Zakharenko
  8. 11. Nathaniel Adams Coles
  9. 13. Norma Jeane Mortenson
  10. 14. Reginald Kenneth Dwight
  11. 16. Belcalis Almanzar