To the people calling this 'self-indulgent, hollow and vain': congratulations you've found exactly the point. Something Lana del Rey often does in her work is to paint a caricature of the American dream, or, if you will, the darker side of the coin maybe; which is (to certain extent– we don't want to hurt anybody's feelings) hollow and self-indulgent, dangerous even sometimes and I think that this film shows exactly that.
This is why it doesn't matter that the imposers don't look like the Hollywood icons, maybe it's even because it's nearly impossible to actually obtain the American dream (which they obviously symbolize)

Lily's boyfriend a weirdo

I sincerely despise my parents for not showing me this when I was a child like, Matilda could have been my only friend and you just took that way from me? MY TWIN SISTER

watched this while my family was at church and me at home with period cramps, love that for me

this movie has what Titanic wants: there's life in it