turn someone's head

verb2

1. •
   To influence someone in a manner that significantly changes his or her behavior.

   • I should not want him to make a fortune—let that come later. It could turn his head, at his time of life, and in many ways be a damage to him. — 1906
2. •
   To attract someone's romantic interest.

   • Young men at Hillsborough—many of whom, I felt sure, had a smarter look than I—had bid stubbornly for her favour. I wondered, often, it did not turn her head—this tribute of rustic admiration. — 1900