This is La La Land, a musicial set in modern day Los Angeles featuring piano man Sebastian (Gosling) and acting wannabe Mia (Stone) as they try to make things work against all odds.
Naturally the talented twosome do some singing in the film and you can hear a sample below in the song City of Stars. It's pretty lovely.
The film also stars John Legend and J.K. Simmons - who deservedly won an Oscar for his part in Whiplash. It has a pre Christmas launch in the US (maybe aiming once again for that award season) and comes out in Ireland on the 13th of January 2017.