Someone or something that catches the eye, the looks of whom/which causes people to look much.(noun)
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Use "head-turner" in a sentence
"Sounds like a mid-life crisis brewing, and how better to act upon it than with a head-turner like Megan."
"Neither is a head-turner: WhiteSmoke, with a history of net losses and negative cash flow, makes English grammar and spellcheck software."
"DIAGNOSIS ESCAPISM: USA Network's soufflé of a medical dramedy, Royal Pains 10/9c, resumes its third season of endless summer in the aftermath of Divya's potentially fatal prescription to diabetic head-turner/guest patient Wilmer Valderrama."