David Walter Foster, OC, OBC (born November 1, 1949), is a Canadian musician, record producer, composer, singer, songwriter and arranger, noted for discovering singers Celine Dion, Josh Groban, Charice and Michael Bublé and for producing some of the most successful artists in the world.

Foster was a keyboardist for the pop group Skylark discovered by Eirik Wangberg. The band's song “Wildflower” was a top ten hit in 1972. He has worked as a producer with a wide range of musical stars, including Andrea Bocelli, Céline Dion, Mariah Carey, Charice, Gloria Estefan, Nsync, Neil Diamond, Whitney Houston, Cher, Prince, Chicago, Earth Wind and Fire, Chaka Khan, Barbra Streisand, Kenny Rogers, Boz Scaggs, Olivia Newton-John, Madonna, Michael Jackson, Janet Jackson, Bryan Adams, Christina Aguilera and many other people. (see "Artists produced," below).

He has produced debut albums for The Corrs, Michael Bublé, Renee Olstead, Josh Groban which were released under his own record label, 143 Records, and distributed through Warner Music. Foster helped launch Kevin Sharp's career after the two met through the Make-A-Wish Foundation and David Hayes singing a song by Laramy Smith "Freind".

In 1985, Rolling Stone magazine named Foster the "master of ... bombastic pop kitsch." That year, Foster composed the score for the film St. Elmo's Fire, including "Love Theme from St. Elmo's Fire" which hit #15 in US pop charts. Another song from the film, "St. Elmo's Fire (Man in Motion)", recorded by John Parr hit #1 on the Billboard Hot 100 on September 7, 1985. The following years, Foster continued turning out occasional film scores, including the Michael J. Fox comedy The Secret of My Success and the Jodie Foster-Mark Harmon drama Stealing Home, both of which spawned soundtrack albums with prominent Foster-penned contributions. He collaborated with then-wife Linda Thompson on the song "I Have Nothing", sung by Whitney Houston in the 1992 film The Bodyguard.

The couple were nominated for a Grammy Award and an Academy Award for Best Song for the song. Foster, along with Kenneth "Babyface" Edmonds, composed "The Power of the Dream" as the official song of the 1996 Summer Olympics, with Thompson providing the lyrics (sung by Céline Dion). He also composed "Winter Games", the theme song for 1988 Winter Olympics in Calgary, Alberta. "Winter Games" is the soundtrack for a fountain show at the Bellagio resort in Las Vegas as well as a fountain show at Sea World Orlando. In 2001, he produced an album of his own arrangement of Canada's national anthem, O Canada, with the Vancouver Symphony Orchestra and Lara Fabian. In 2003, Foster won an Emmy Award for Outstanding Music and Lyrics for The Concert for World Children's Day. His song "I Will Be There With You" (sung with Katharine McPhee) is being used by Japan Airlines to promote the introduction of new aircraft to its US flights.

During the 1990s he often performed acts with San Diego vocalist Warren Wiebe, whom he had discovered in the restroom of a hotel bar in 1987. In 1994 he had Wiebe put together a band called Millennium featuring Nita Whitaker and a few session vocalists, but the deal with Foster's record company led to the group's demise. Wiebe was Foster's "mouth" on many of his videos but committed suicide before he could release a solo album.

In 2009 it was revealed that Foster had worked with songwriter Diane Warren to produce records for Whitney Houston's upcoming album. It was then announced that her comeback single would be the Foster-produced "I Didn't Know My Own Strength".

He recently collaborated with American Idol finalist Michael Johns on the re-write of his popular 80's hit "St Elmo's Fire (Man in Motion)."