1 of 5
''Before My Time''
Film: Chasing Ice
Music and Lyrics: J. Ralph
For a doc about climate change, composer Ralph tapped actress Scarlett Johansson and classical-violin superstar Joshua Bell to perform this chilly ballad.
2 of 5
Film: Les Misérables
Music: Claude-Michel Schönberg
Lyrics: Herbert Kretzmer and Alain Boublil
Oscar nominee Hugh Jackman sings Les Miz's only award-eligible tune — written for the film by the musical's original composers — just after Jean Valjean takes in the orphan Cosette.
3 of 5
Film: Life of Pi
Music: Mychael Danna
Lyrics: Bombay Jayashri
Indian vocalist Jayashri croons over a soothing wisp written by Danna, a Canadian film composer whose credits include (500) Days of Summer and Moneyball.
4 of 5
Music and Lyrics: Adele and Paul Epworth
Adele doing a Bond song seems like a no-brainer, but the singer actually had to be talked into accepting the gig by her boyfriend, Simon Konecki. The result is the first Oscar-nominated 007 tune since 1981's ''For Your Eyes Only.''
5 of 5
''Everybody Needs a Best Friend''
Music: Walter Murphy
Lyrics: Seth MacFarlane
After MacFarlane and Norah Jones dueted on the Ted writer-director's 2011 jazz-vocals album, they reteamed for a retro big-band track boasting Jones' vocals.