Lorde wont go #1 on the Hot100. Wake Me Up will have massive airplay (Pop/HAC/AC/Rhythmic/Alt/AAA) and Roar too (it's a KP song ) and both will likely have great streaming (especially WMU).
I can't at the amount of bandwagoners for that horrible Royals song
THIS.
It's just the typical pop song but just cause it's an "underrated" girl that nobody knows about everybody jumps in. If it was a male singer everybody would be pressed about it.