Is it normal for my 23 year old sister to be obsessed with the Jonas Brothers?

I'm a 17 year old girl. Ever since the Jonas Brothers came back, my big sister has been obsessing over them. Isn't the band for TEENAGE girls?? Their content seems like something a 14 year old listens to but the funny part is that I don't know any teenage girls who are crazy for them!! In fact, I... show more I'm a 17 year old girl. Ever since the Jonas Brothers came back, my big sister has been obsessing over them. Isn't the band for TEENAGE girls?? Their content seems like something a 14 year old listens to but the funny part is that I don't know any teenage girls who are crazy for them!! In fact, I haven't even heard about this band before they apparently came back.
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