Hilary Duff. That train is loooong gone (when it comes to major pop girl status).
Also Vine & YouTube celebrities, The Jonas Brothers, Big Time Rush, The Wanted, Tokio Hotel and irrelevant reality tv stars (aka anyone that's not Kim-K).
I don't understand the
hype behind
current One Direction, 5SOS, Justin Timberlake and Taylor Swift neither but to each their own

. I see why they might like them.
Basically, I'm in no place to judge anybody's taste considering some of the music I listen to

. I guess some people stan inactive musicians because it's hard to let go someone you adored so much for so long, so I can't really blame the Avril / Christina / Britney stans. At least they're still putting out music for the fans.