Secret (Chinese: 不能說的祕密電影原聲帶; pinyin: Bùnéng shuō de mìmì dian ying yuan sheng dai) is the soundtrack album for the 2007 Taiwanese romance film, Secret, directed and co-written by Jay Chou; starring Chou, Gwei Lun-mei, Anthony Wong and Alice Tzeng.

The album was produced by Chou, released on 13 August 2007 by JVR Music and distributed by Sony Music Taiwan. It was released as a limited edition with a 100-page booklet containing 50 photos from the film.

The album contains 21 instrumental tracks composed or rearranged by Chou and Thai musician Terdsak Janpan and four theme songs, including "不能說的祕密" (Secret), a Brit-style rock ballad performed by Chou. The track "鬥琴" (Piano Duel Medley) was rearranged by Chou based on Chopin's Waltz in C-sharp minor and Étude Op. 10, No. 5 with an introduction by Zhan Yuhao. "The Swan" is a piano concerto performed by Chou and Evergreen Symphony Orchestra based on Le cygne, the 13th movement of The Carnival of the Animals by Camille Saint-Saëns.

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