I don’t watch a lot of new media, so I can’t comment on new actors and actresses that much. Everyone that I can think of is already covered.
I’ll add this to the thread, and then add my thoughts in general;
Britney Spears always looked average, as a teenager and an adult (with some worse for wear because of life choices, in her later years). She’s not ugly. But she wasn’t the only girl that looked like she did in her area of Louisiana.
I’m not going to critique her childhood appearance, but the only times that she really stands out is when she has heavy eye makeup on. And it’s hard to find pictures of her as an adult without it.

I feel like her skimpy clothes when she debuted her music at
16 years old, heavily swayed people finding her hot.
And while we’re at it, let’s talk about someone in a similar vein;
Justin Timberlake

It was difficult for me to not use a picture where I feel like the photographer didn’t do him even more dirty.
He has a rat face with pinched features, doesn’t know how to smile, and doesn’t even have a good personality to make up for it.
And lastly, something that I saw touched on with Sydney Sweeney, and is relevant to Britney (in my opinion); some people find certain celebrities attractive because they do look more like an average and approachable person.
This thread made me look back on my celebrity crushes, and while I can agree that most wouldn’t find them hot, the relatability factor is attractive to me. I feel Ike most of the celebrities that I find hot would be “cute” to most people.
That isn’t to say that I’m bashing any one’s opinion here; it’s just a different thing to consider why people are attracted to certain people.
Except for the truly weird looking celebrities. I haven’t figured that one out yet.