Cinderella girl; overnight sensation
Wasei-eigo term for a previously unknown girl who suddenly becomes famous, often through a single event or discovery. Carries a fairy-tale-like nuance of rapid transformation.
wasei-eigo (Japanese-coined English), from Cinderella girl
She won the audition show and became a Cinderella girl overnight.
That new idol is a real Cinderella girl, isn't she?
Variant spelling with an interpunct; less common but still seen.
Wasei-eigo from English 'Cinderella' and 'girl'. The term was popularized in Japanese media and is not a direct borrowing from English.