Guys let's not take the years ending with an 8 thing so seriously, that's not really what the topic is about! :P

1968 - Mary Hopkin

1958 - Connie Francis

I think rather than female, the next huge star to emerge will probably be Post Malone, like Drake, I'm getting Hotline Bling teas from Rockstar. Dua and Camila I feel will the closest to a Gaga/Katy sort of thing, but females can't smash like that in the streaming era really, I think it comes down to the songs really. New Rules and Havana for exmple struck the exact right chord whereas Lost In Your Light bombed for Dua.

Oh definitely. Post's forthcoming album will get an insane amount of first week streams, possibly the 2nd best ever behind Ed Sheeran.