Had this discussion in my house today, too. Told DD that, based on this thread, I must HAVE to know some Taylor Swift songs.

So she played some for me, and I didn’t!
I am on Instagram (not TikTok) but I often keep the sound off *. Generally when I listen to music I play it off my Spotify playlists so I just don’t have an opportunity to hear her music, or much new music for that matter. (I love what I like!)
Neither of my twenty-somethings is a TS fan, but they do like some of the other artists mentioned here - Dua Lipa, Brett Eldredge, country music, etc. Some of their friends are absolutely bonkers for TS, though.
When DD was a teen she was, along with many other young people of her era, a huge fan of One Direction. I even chaperoned some concerts and got to like them myself, too. My 30-something niece has been a huge fan of the band Hanson since she was young, and other boy bands. She also liked 1D and went to see both Harry Styles and Ed Sheeran not too long ago (Moms’ night out - I should ask her if she is a TS fan!)
Many of the boy bands were pretty big. (Of course not nearly as big as TS, but just sayin’. )
A lot of it really
is generational and a matter of exposure. If you’re around the music, of course you’ll pick it up. My DH grew up working overnights in a bakery with older men and mostly they listened to talk radio. So when I met him, DH knew mostly old stuff like Mack the Knife and Elvis tunes that some of the old guys listened to.
I am a Beatles fan but Elvis was a bit before my time (though DH is a fan and we tease him about it; I have a great picture of him wearing Elvis glasses that he won at a singalong night

). I was born in the 60s with an older brother and sister who were into Rock and Pop, respectively, so that’s where much of my exposure was then, and of course myself, growing up in the 70s, for many years there my friends and I always had the radio and 8 tracks going. Life got busy for me in the 80s and 90s and beyond, so I stuck with my tried and true for the most part.
My parents music was swing era (40s) and show tunes. One aunt and uncle were into polka music (like Biergarten!).
So good for TS, it seems like she’s a really good songwriter and performer - more power to her. I think if I knew her music I would probably like it (as long as I can understand what she’s saying). I will have to give it a listen one of these days! Do people post many of her songs her on the song threads? (Or is that a loaded question, lol.)
Everyone here has their own story about their music history. Personally I really loved @BlueStarryHat’s story when she told it once before, with her Dad.
* I keep the sound off on my IG because we have shift workers in our house and usually someone’s sleeping and they wake up easily even with low sounds. Figured I’d get asked why so just answering.
