It girl; charming young woman with sex appeal
Refers to a young woman who is fashionable, charismatic, and often in the spotlight. The term is borrowed from English and used in similar contexts.
彼女はパーティーのイットガールだった。
She was the It girl of the party.
雑誌が今年のイットガールを特集している。
The magazine features this year's It girl.
Borrowed from English 'It girl', popularized in the 1920s by Elinor Glyn referring to actress Clara Bow.