Someone told this is steelfish but it's not.

Philfont  Suggested by whyos 
Rainbow  Suggested by dimadorokhov 
Bebas Neue  Suggested by Foneditor 

I think it's Bebas or Bebas Neue.

This font itself doesn't exist, it's a custom typeface made by Universal Music exclusively for Lana Del Rey. It's called "Rainbow".

omg finally!

"Rainbow" is a fanmade font...a user on spillitnow.com created it..

Fanmade but still...

Here.