There are three ways of saying it:
Prima Donna: meaning "first lady", this term was mainly used during the baroque and classical period for example 'The prima donna, Caterina Cavalieri'.
Heroine: It's a term used for a character in an Opera, not for a singer, used during the early Romanticism, for example: "Rossini's heroines, Rosina, Angiloina (Cenerentola) and Isabella."
Diva: it means 'godess' and it was used from the middle of th 19th century to the present, it decribes a singer who wants everything her way because she rules at the opera house, for example: Maria Callas.
well a female opera singer is a prima Donna
The female protagonist is Christine Daaé, a young Swedish opera singer.
A woman opera singer is typically referred to as a "soprano," which denotes a specific vocal range. However, there are other classifications for female opera singers, including "mezzo-soprano" and "contralto," depending on their vocal range and timbre. Collectively, they are often simply called "opera singers."
stand
Maria Callas
Montserrat Caballe is a female spanish opera singer
Anna Netrebko
donna summers
Dame Kiri Tekanawa
A Chanteuse is a female mightclub singer.
leontyne price
Well, often they happen to be, but a prima Donna is actually more of an annoyingly full of herself female singer (almost always a soprano) who insists on running everything her way or she will throw a fit and refuse to sing. Kind of like a musical drama queen. You have to put up with them because the opera can't go on without them. *sigh* Originally the phrase did mean the main female singer in an opera, or the female member of the opera troupe who almost always got the leading role.