The American Girl in Paris Box Set (Books 1 and 2)

Aria is a 15-year-old girl with a stunning voice that stops people in their tracks. There's just one catch-it's deep. So deep, some think it's a boy's voice.
When she's accepted in a prestigious school in France, she leaves Brooklyn despite her father's disapproval and moves into a beautiful castle to study classical music.
But between her rivalry with the cute and popular Maxime who dislikes Americans, and a teacher who believes a girl with a low voice should be confined to minor roles, Aria's ambitions are put to the test.
And when her celebrity crush asks her to collaborate on his upcoming album, Aria will have to decide if the opera world is where she truly belongs.