It's contemporary classical music.
Best described here:
"Her characteristic singing style lacked lyrics, communicating emotions through sounds, the way a violin would. She used her voice like a musical instrument giving a soft, unique dream-like tone. Most of her recordings are arrangements of classical themes composed originally for instruments rather than voice, while the arrangements consist generally of large orchestral ensembles mixed with a pop-rock band instrumentation. She incorporated pop-rock elements that made her music appealing."
https://en.m.wikipedia.org/wiki/Danielle_Licari