Triumphant ‘La La Land’ demonstrates the power of dance to tell a story

“La La Land” opens with a huge dance number set on an L.A. freeway. (Dale Robinette/Lionsgate)

“It feels really nostalgic to me,” frets a self-conscious Mia (Emma Stone) in “La La Land,” after reading her one-woman play to her boyfriend, Sebastian (Ryan Gosling). “Do you think people are going to like it?” More