You could say "mi persona famosa".
To say 'I am a person' in Spanish, you would say 'Soy una persona.'
To say 'He is a person' in Spanish, you would say "El es una persona.'
Es una cantante / cantatriz célebre / famosa.
famoso
Franco.
Pablo Picasso
Paisajes famosos
deportista
No. "Most" already means there is no person more famous. You don't need to say "top". The most famous person is good enough.
Santana a spanish guitar player.
A person speaking Spanish would say "Loren" because that is a person's name. The Spanish equivalent to Lauren or Loren is "Laura" pronounced lau-ra.
Ser libre.