Shostakovich - Waltz No 2

made famous by the soundtrack to Stanley Kubrick's Eyes Wide Shut

Shigeru Umebayashi - Yumeji's Theme

theme of Wong Kar-wai's "In the mood for love movie, originally from the soundtrack of Seijun Suzuki's "Yumeji"

Vivaldi - The Four Seasons (Summer)

Composed in 1723, The Four Seasons is Vivaldi's best-known work. The texture of each concerto is varied, resembling its respective season; "Summer" evokes a thunderstorm in its final movement.

3.Carl Orff - Carmina Burana (O Fortuna)

Carmina Burana is a scenic cantata composed by Carl Orff between 1935 and 1936. "O Fortuna", that opens and closes the piece, is the best-known movement.

2.Prokofiev - Romeo and Juliet

is obvious :) a ballet by Sergei Prokofiev based on William Shakespeare's play Romeo and Juliet

1.Yann Tiersen - Comptine d'un autre ete (L'apres midi)

a piano piece composed by Yann Tiersen, known from "Amélie", also understood to contribute a sadness to the film, representing days gone by.