Have you ever felt like you're going crazy because you know you've seen something or someone before, but you can't remember their name or the title?

I was watching an ad yesterday and this girl appeared.
She's pretty... and I recognize her face? But suddenly I can't remember her name.ㅠ
It was just a fleeting glimpse, so I don't even know what the ad was for. Was it cosmetics???
It's on the tip of my tongue. I definitely know her... and suddenly I feel this crazy urge to find her lol
It was this person.

Moon Ga-young in the Lux ad
Ah... what a relief lol