Question: What member of Cantopop group Twins makes a special appearance in the film Love on the Rocks?

Context paragraphs:
Samba (Twins album): Samba is an album by the popular Cantopop group, Twins, released in June, 2005.

The Twins Effect II: The Twins Effect II is a 2004 Hong Kong action fantasy film directed by Corey Yuen and Patrick Leung.  The film is a sequel to "The Twins Effect" (2003), but has a completely different story from the first film.  It starred Charlene Choi and Gillian Chung of Cantopop duo Twins in the leading roles.  Co-stars include Donnie Yen, Daniel Wu, Edison Chen, Wilson Chen, Tony Leung Ka-fai, Qu Ying, Fan Bingbing and Jim Chim.  Jackie Chan also makes a cameo appearance, along with his son Jaycee Chan who is in his debut.  The film's original English working title was Huadu Chronicles: Blade of Rose and its US DVD release title is Blade of Kings.

Race Wong: Race Wong is an actress, singer and businesswoman.  Born in Malaysia, raised in Singapore, she pursued her career in the entertainment industry in Hong Kong with her sister Rosanne Wong which won her various awards for her singing career as the cantopop group 2R, including Most Promising Newcomer and Most Popular Group Award in the Annual Top 10 Song of the Year Awards (2003), Metro Broadcasting Music awards (2004), TVB Top 10 Songs of the Year (2004) and Hong Kong Commercial Radio Music Awards’ (2003).

Twins' Love: Twins' Love is an EP by the Cantopop group Twins.  Since the first EP "Twins (AVEP)" was a great success, the Twins released this second CD just 3 months later, in November 2001.  It contained 8 songs and 1 music video, "Oi Ching Dong Yap Jun" (愛情當入樽).

William Chan: William Chan Wai-ting (born 21 November 1985) is a Hong Kong singer and actor.  In 2003, he participated in New Talent Singing Awards and won several awards.  He was then signed under Emperor Entertainment Group.  He began his singing career by joining Cantopop group Sun Boy'z in 2006 and left the group in 2008 to pursue a solo career, releasing his debut solo album in the same year.  Since then, he has released a total of 7 albums and 6 singles.

The Twins Effect: The Twins Effect, also known as Vampire Effect in the United States, is a 2003 Hong Kong film directed by Dante Lam and Donnie Yen.  The film was derived from Cantopop group Twins, starring both members Charlene Choi and Gillian Chung in the leading roles.  Co-stars include Edison Chen and Ekin Cheng.  Jackie Chan makes a

Love on the Rocks (film): Love on the Rocks () is a 2004 Hong Kong romantic comedy film directed by Dante Lam and Chan Hing-ka.  The film stars Louis Koo and Gigi Leung, with special appearances by Charlene Choi and Donnie Yen.

Charlene Choi: Charlene Choi (born 22 November 1982) is a Canadian-Hong Kong actress and singer.  She is a member of Cantopop group Twins, along with Gillian Chung.

Angela Au: Angela Au Man-sze (born 25 January 1983) is a Hong Kong singer and radio DJ/Web J.  A former a member of the cantopop group, "Cookies", she had previously been a student and part-time model.

Ho Hoo Tan: Ho Hoo Tan is an album by the Hong Kong Cantopop group Twins.  It was released in September 2006 by EEG.

Supporting paragraphs: Love on the Rocks (film) Charlene Choi
Answer: Charlene Choi