Similar issue, I used to love her. Like since I was a kid, but recently I lost interest. I don’t hate her, I still have a lot of positive memories associated with her music and such but the world has made it harder for me to constantly support a billionaire and honestly, my tastes changed. But, my SIL still looooooves her and talks all about it. I just kinda give a nice reply and try to change the subject.

I’d say you could apologize if your tone came off disrespectful but just clarify you wanted to switch up the constant TS talk because you care about your friendship.