Question: "Another Day of Sun" is the opening number from a film that stars who as a jazz pianist?
Context: Peter Apfelbaum (born August 21, 1960) is an American avant-garde jazz pianist, tenor saxophonist, drummer and composer born in Berkeley, California.  He first emerged on the jazz scene in the late 1970s, performing with Carla Bley from 1978–1982 and touring with Warren Smith and Karl Berger.  Around this time Apfelbaum also studied and worked with musicians involved with the Creative Music Studio in Woodstock, New York.  He graduated from Berkeley High School in 1978 in a class that included jazz pianist Benny Green. "(I Can't Make It) Another Day" is a song by American recording artist Michael Jackson featuring Lenny Kravitz, released on the posthumous album "Michael" which has sold 6.5 million globally.  Initially leaked as a 90-second snippet, it was referred to as "Another Day".  Shortly after the leak, singer-songwriter Lenny Kravitz confirmed that he had produced and composed "Another Day"; he stated that although he did not leak the song, he would like to have the full version of the song—in which he also features—officially released.  Kravitz later referred to the song as "(I Can't Make It) Another Day" on Facebook prior to the release of the "Michael" album.  The song was recorded for the album "Invincible", but dropped from the final track list.  It was later re-written and re-titled "Storm", a collaboration between Kravitz and rapper Jay-Z which is featured on the former's 2004 album "Baptism". Terje Bjørklund (born 2 January 1945 in Narvik, Norway) is a jazz pianist and composer.  He was an active jazz pianist until approximately 1980.  From then on he has concentrated on composing. Bill Clifton (July 6, 1916 – February 26, 1967) was a Canadian jazz pianist based in New York City for almost three decades.  He played with many of the name bands of the swing era and accompanied some of the music industry's most noted vocalists He is remembered today as an early and important influence on the great jazz pianist Bill Evans. "Another Day of Sun" is the opening number from the 2016 musical film "La La Land".  The ensemble number portrays an ensemble of drivers in a Los Angeles traffic jam on a highway ramp singing and dancing about their aspirations to succeed in Hollywood.  The song was filmed on location on a 130-foot-high express ramp of the Judge Harry Pregerson Interchange in three shots, edited with hidden cuts to give the illusion of a single six-minute take.  The song was composed by Justin Hurwitz with lyrics by Benj Pasek and Justin Paul, and choreography by Mandy Moore. Another Day is an album by Canadian jazz pianist and composer Oscar Peterson, released in 1970. Daniel Lee Knight (born September 26, 1953, Ottumwa, Iowa), is a jazz pianist, composer, educator, and author.  His early piano education was in the classical tradition; his first piano teacher, Tillie Maither, was a former student of Ignace Jan Paderewski.  His interest in jazz began at an early age, and by age seven he was already transcribing the works of Dave Brubeck, Erroll Garner and Duke Ellington.  In 1958, on seeing NBC Television's "The Subject Is Jazz", the first ever television series on the subject of jazz, and whose Musical Director was jazz pianist Billy Taylor, he knew he had to become a jazz pianist, too. Cyrus Chestnut (born January 17, 1963) is an American jazz pianist, composer and producer.  In 2006, Josh Tyrangiel, music critic for "Time", wrote: "What makes Chestnut the best jazz pianist of his generation is a willingness to abandon notes and play space."  Chestnut enjoys mixing styles and resists being typecast in any one niche, though his gospel sound is apparent on a number of his recordings. La La Land is a 2016 American musical romantic comedy-drama film written and directed by Damien Chazelle.  It stars Ryan Gosling as a jazz pianist and Emma Stone as an aspiring actress, who meet and fall in love in Los Angeles while pursuing their dreams.  The film's title refers simultaneously to music, the city of Los Angeles, and to the idiom for being out of touch with reality. Martan Mann is an American jazz pianist and educator living in Boulder Creek, California.  He performs with the Martan Mann Trio, the Martan Mann & Mannkind (contemporary jazz band) and has performed with George Young and Dmitri Matheny.  A graduate of San Jose State University, San Francisco State University, Hawaii Pacific College, and the University of Hawaii, he is a musical director at Capitola Theater in Capitola, California and is on the board of directors for the Jazz Society of Santa Cruz, California.  Jazz educational books include "Jazz Improvisation for the Classical Pianist" (1989), "New Age Improvisation for the Classical Pianist" (1994), and "Improvising blues piano" (1997).  He is also the author of an jazz educational DVD, "Jazz Skills for Piano".
Answer: Ryan Gosling