Question: What is the name of the musician who is a winner of four Academy Awards and also composed music for It's Always Fair Weather?

Context articles: Siddharth Mahadevan
Killer Films
It's Always Fair Weather
Joe Letteri
List of accolades received by District 9
Naoki Satō
Sahir Ali Bagga
André Previn
David Nessim Lawrence
Merrill Jenson

Siddharth Mahadevan is an Indian playback singer and composer who is known for his songs in the film "Bhaag Milkha Bhaag" in which he sang "Zinda" and the rock version of the title song "Bhaag Milkha Bhaag".
 He got further acclaim for the song Malang by music director Pritam in the movie Dhoom 3.
 He has also composed music for the Marathi film "Swapna Tujhe ni Majhe" with his cousin Soumil.
 he also composed all the songs of a Marathi movie sugar salt ani prem with his cousin Soumil Shringarpure
Killer Films is a New York City-based independent film production company founded by movie producers Christine Vachon and Pamela Koffler in 1995.
 The company has produced a number of the most acclaimed American independent films over the past two decades including "Far From Heaven" (nominated for four Academy Awards), "Boys Don't Cry" (Academy Award winner), "One Hour Photo", "Kids", "Hedwig and the Angry Inch", "Happiness", "Velvet Goldmine", "Safe", "I Shot Andy Warhol", "Swoon", "I'm Not There" (Academy Award nominated), "Kill Your Darlings", "Still Alice" (Academy Award winner) and "Carol" (nominated for six Academy Awards).
 Killer Films executive produced Todd Haynes' five episode HBO miniseries "Mildred Pierce" featuring Kate Winslet and Guy Pearce, which went on to win five Emmys, a Golden Globe and a Screen Actors Guild Award.
It's Always Fair Weather is a 1955 MGM musical satire scripted by Betty Comden and Adolph Green, who also wrote the show's lyrics, with music by André Previn and starring Gene Kelly, Dan Dailey, Cyd Charisse, Dolores Gray, and dancer/choreographer Michael Kidd in his first film acting role.
Joe Letteri, ONZM (born 1957) is a senior visual effects artist, winner of four Academy awards, four BAFTA awards and four VES awards.
 He is the current Director of the Academy Award-winning Weta Digital, having joined the company in 2001.
 He has received several awards and nominations as visual effects supervisor, the latest (as of January 2015 ) being "Dawn of the Planet of the Apes".
 He attended Center High School (Pennsylvania) in 1975 and graduated from the University of California, Berkeley in 1981.
 He gave the keynote address at UC Berkeley's December Convocation on December 19, 2010.
"District 9" is a 2009 science fiction thriller film directed by Neill Blomkamp.
 The National Board of Review has named it one of the top 10 independent film of 2009.
 It received four Academy Awards nominations, seven British Academy Film Awards nominations, five Broadcast Film Critics Association nominations, and one Golden Globe nomination.
 It is the fourth film ever nominated for Best Picture at the Academy Awards for TriStar Pictures.
Naoki Satō (佐藤 直紀 , Satō Naoki , born May 2, 1970 in Chiba, Japan) is a Japanese composer who has provided the music for several popular anime series including the first five "Pretty Cure" series, "X", "Eureka Seven", "Sword of the Stranger", and "Blood-C".
 He graduated from the Tokyo College of Music in 1993.
 At the 29th Japan Academy Prize in 2006, he won the Best Music prize for his work on the film "Always Sanchōme no Yūhi (Always Sunset on Third Street)".
 He also composed music for anime films such as "Pretty Cure All Stars DX" trilogy, "Stand By Me Doraemon".
 In live-action dramas, he provided music and soundtracks for TV dramas "Good Luck!!
" "Water Boys", "H2: Kimi to Ita Hibi" and "Ryōmaden".
 He provided the music for the "Space Battleship Yamato" film, as well as the "Rurouni Kenshin" and "" live-action film series.
 For the 38th Japan Academy Prize in 2015, he was nominated in the Best Score category for his work in "The Eternal Zero".
 While he did not win the award, "The Eternal Zero" won several awards including Best Picture, and "Stand By Me Doraemon" won for Best Animated Film.
Sahir Ali Bagga (Urdu: ساحر علی بگا‎ ) is a Pakistani singer, music director and composer from Lahore, who composes music for Lollywood and other independent singers.
 Recently he has composed music for the Pakistani movie, "Zinda Bhaag (2013)".
 He also worked on the soundtrack of Pakistani movies, "Hijrat" and "Tamanna", contributing two songs to the latter; Koi Dil Mein and Chell Oi.
 He has also composed music of Hum TV's Ishq-e-Benaam.
André George Previn, KBE ( ; born Andreas Ludwig Priwin; April 6, 1929) is a German-American pianist, conductor, and composer.
 Previn is the winner of four Academy Awards for his film work and ten Grammy Awards for his recordings (and one more for his Lifetime Achievement).
David N. Lawrence (born 1960) is an American musical composer known primarily for his work on television and movie scores.
 In 2002, he won an ASCAP award for his work on "American Pie 2".
 He also composed music for the Disney Channel Original Movies "High School Musical", "The Cheetah Girls 2", "High School Musical 2", "High School Musical 3", "Jericho (TV Series by CBS 2006)" and "".
 He also composed additional music for three Sesame Street videos like "Elmo Says BOO!
," "Big Bird Gets Lost," and "Let's Eat!
 Funny Food Songs," where he was credited as David Lawrence.
Merrill Boyd Jenson (born January 20, 1947) is an American composer and arranger who has composed film scores for over thirty films including , , The Testaments of One Fold and One Shepherd, , Harry's War, and Windwalker.
 Many of the films Jenson composed music for were directed by Academy Award-winning director Kieth Merrill.
 Jenson has also composed several concert productions including a symphony that premiered at Carnegie Hall.
 Additionally, he has composed music for many television commercials including the acclaimed Homefront ads, music for three outdoor pageants, and several albums.
 Jenson lives in Provo, Utah with his wife Betsy Lee Jenson.