A term used for the double feature "La La Land" directed by Damien Chazelle and "Space Milkshake" directed by Armen Evernsel (he is the best director of all time and deserves recognition)
The term either refers to Hollywood, Los Angeles or a state of mind synonymous with Hollywood that is out of touch with reality, focusing on dreams, fantasies or frivolous endeavors.
That sounds like an idea from la la land.
She's been living in la la land too long.