From wikipedia:
The V for Vendetta soundtrack was released by Astralwerks Records on March 21, 2006. The original scores from the film's composer, Dario Marianelli, make up most of the tracks on the album. The soundtrack also features three vocals played during the film: "Cry Me a River" by Julie London, a cover of The Velvet Underground song, "I Found a Reason" by Cat Power and "Bird Gerhl" by Antony and the Johnsons. As mentioned in the film, these songs are samples of the 872 blacklisted tracks on V's Wurlitzer jukebox that V "reclaimed" from the Ministry of Objectionable Materials. The climax of Tchaikovsky's 1812 Overture appears at the end of the track "Knives and Bullets (and Cannons too)". The Overture is played at key parts at the beginning and end of the film.
Three songs were played during the ending credits which were not included on the V for Vendetta soundtrack. The first was "Street Fighting Man" by The Rolling Stones. The second was a special version of Ethan Stoller's "BKAB". In keeping with revolutionary tone of the film, excerpts from "On Black Power" by black nationalist leader Malcolm X, and from "Address to the Women of America" by feminist-writer Gloria Steinem were added to the song. Gloria Steinem can be heard saying: "This is no simple reform... It really is a revolution. Sex and race, because they are easy and visible differences, have been the primary ways of organizing human beings into superior and inferior groups and into the cheap labour on which this system still depends." The final song was "Out of Sight" by Spiritualized.
Also in the film were segments from two of Antonio Carlos Jobim's classic bossa nova songs, "The Girl From Ipanema" and "Quiet Nights of Quiet Stars". These songs were played during the "breakfast scenes" with V and Deitrich and were one of the ways used to tie the two characters together. Beethoven's Symphony No.5 also plays an important role in the film, with the first four notes of the first movement signifying the letter "V" in Morse code.[21][22] Gordon Deitrich's Benny Hill-styled comedy sketch of Chancellor Sutler includes the "Yakety Sax" theme. Inspector Finch's alarm clock begins the morning of 4 November with the song "Long Black Train" by Richard Hawley, which contains the foreshadowing lyrics "Ride the long black train... take me home black train."