She's not a rock star, despite the negligible difference between Nickleback and modern country. That said, I can't think of an attractive rock star. Rock is pretty much dead.
First few that come to mind just ooze sex and rock 'n roll on stage, it's not that I find them necessarily ultimately sexual attractive.
To me she's a rock star Neon ... Maybe not as loud as Joan Jett or as crazy as the late great Janis Joplin but I do believe she is more rock than country. Just MHO. Don't take it so seriously ... Its just a Forum on an Internet Board. Chill out and have a beer ... thats what I'm doing right now. Life is short ... Could be even shorter now with Covid19! lol.
She plays Nashville, and I'm sure considers herself a country musician. But, like I said, there's little difference between modern rock and modern country. This thread is all about the vanity that breeds this indifference, though, and I'm not really interested. Who is "hot?" Boring. Who makes visceral music? None of ya.