VIDEO : Ryan Gosling Still Impressed by Emma Stone in 'La La Land'

John Legend talks acting in 'La La Land' 00:51 Los Angeles (CNN)Much has already been said of Ryan Gosling and Emma Stone's impressive turn in the ambitious and whimsical modern musical "La La Land," a film that's garnering significant praise heading into award season -- from the actor's electric chemistry to their arduous months-long preparation for the roles Sebastian and Mia. "I think they do this incredible magic trick in the movie and make it seem effortless," he said. Chazelle said he sees it as a story of hope and "I think that we need some hope right now."