"La La Land" also stars Finn Wittrock, Rosemarie DeWitt, J.K. Simmons, and John Legend, who can be seen briefly in the trailer. The film re-teams Simmons with his "Whiplash" director Damien Chazelle.

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"Here's to the hearts that ache ... here's to the mess we make," Emma Stone sings in the new trailer for "La La Land." Her lovely, melancholy voice floats over scenes of her kissing Ryan Gosling ...