1. "You Must Be Happy" is a love song sung by Chinese mainland singer He Jie, with lyrics written by Tang Tien and music composed by Wu Mengqi, as the theme song of the TV series "Beautiful Decibel", which was released on March 25, 2006 officially. Lyrics: Gambling on a chip of happiness, thinking of him on the streets where people come and go.
2. "Say Yes to Happiness" is a song arranged by Chung Hsing-Min, lyrics by Fong Wen-Shan, composed and sung by Jay Chou, and included in Jay Chou's album "The Magic Jade Seat", which was released on October 14, 2008, and was released on March 25, 2006, as the theme song for the drama "Beautiful Decibel". Lyrics: You don't wait for the promised happiness, I'm wrong tears dried up letting go and regretting.
3, "Dimple" is a chorus of songs by JJ Lin and Charlene Choi (Sa), lyrics by Wang Yajun, composed by JJ Lin, first released on September 29, 2008 , included in the album "JJ Land" released on October 18, 2008 by JJ Lin, as well as Charlene Choi's album "Two Missing One" released on April 6, 2009 . Lyrics: Happiness is starting to show signs, fate has us slowly leaning close.
4. "Liang Shanbo and Juliet" is a song sung by Zhuo Wenxuan and Cao Ge, with lyrics and music by Cao Ge, and included in Zhuo Wenxuan's album "Habits" released on October 26, 2006 . The song was chosen as the ending song of the idol drama "Queen of Love" and the background music of the marriage program "Non-Honest Do Not Disturb". Lyrics: Happy every day, romantic every night.
5. "Ferris Wheel of Happiness" is a song written by Lin Xi, composed by Eric Kwok (郭偉亮), and sung by Eason Chan. It is included in the album "Happiness" and was released on November 24, 1999 . Lyrics: When life seems to flow on a ferris wheel, the happiness place kisses the starry sky at any time.