But this is ATRL, where half the arguments are centered around the question of who did what first
Nevertheless, yes I agree, not everyone can start their own subgenre of music such as Hollywood Sadcore or Narco-swing like the Lana Del Rey has with her albums
The "dance-pop" trend doesn't even seem like a significant era in music where people can properly pinpoint who started what.
Dan said that everything on the record, all the songs have this kind of narco-swing. So whereas the beat and the verses on “West Coast” were really direct, the chorus naturally slipped into this half-time beat. I just remember everyone at the label being like, ‘God, it’s getting slower at the chorus?’ And we were like, yeah!
Yes she's even put a personal stamp on her innovative sound
Buzzwords associated with Lana Del Rey: hollywood sadcore, narco-swing, gangster Nancy Sinatra, saddest, baddest diva in rock, Queen of Coney Island, elusive chanteuse, etc.
What an eclectic list of things associated with her
I mean, do you all see "S.O.S." as a defining song of our era? It's not even among Rihanna's signature hits.
It would have been, if Rihanna did not take off and soar to even greater heights. It's played on the radio even still today, so it's remembered just as much as Sexyback and Promisuous were. Those are the only remembered dancepop/electropop songs of that year.
(mainly the chorus) 
