I'm a bit out of touch so they'll end up with only 80s/90s music if I don't get some guidance from more with-it mners 
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DD seems to wander around singing "Roar" all the time - apart from that I have no idea what to put on the ipod for her little disco. I literally have nothing post-2000 so I need all the obvious suggestions (that I am blissfully ignorant about at the moment).