The term soundtrack now most commonly refers to the music used in movie/television shows, and/or an album sold containing that music. Sometimes, the music has been recorded just for the film or album. Often, but not always, and depending on the type of the movie, the soundtrack album will contain portions of the score, music composed for dramatic effect, as the movie's plot occurs. Camille Saint-Saens is the first composer of movie soundtrack, specifically for use in motion picture, and releases recordings of songs used in films on 1930s. Henry Mancini, who won an Emmy Award and two Grammys for his soundtrack. By convention, a soundtrack record can contain all kinds of music, including music 'Inspired by', but not actually appearing in the movie. the score contains only music by the original film' composer(s).
This is the example of soundtracks
Breaking Dawn (It Will Rain)
Hunger Games (Safe and Sound)