a first or principal female singer of an opera company.

a temperamental person; a person who takes adulation and privileged treatment as a right and reacts with petulance to criticism or inconvenience.

noun

diva , first lady , headliner , lead vocalist , leading lady , opera singer , singer , soloist , star , superstar , superwoman , topliner , conceited person , crybaby , egotist , narcissist , princess , self-centered person , spoiled brat , vain person