Karena was working at her Vancouver family restaurant when she was discovered by a talent scout from Taiwan in 1993, at age fifteen. The scout persuaded her to fly to Taiwan that Christmas, alone, for a singing audition in the hope of securing a professional contract. The audition was a success and she released two albums, her debut album in 1995 and her second album later in 1999. However both were met with modest success.
Her film debut in 2002 changed all this and propelled her to real stardom. Karena starred in three successful Hong Kong films in the same year, winning the awards of Best Supporting Actress and Best New Performer for her role in July Rhapsody directed by Ann Hui (at the 2002 Hong Kong Film Awards) and for Inner Senses by Lo Chi Leung (at the Taiwan Golden Horse Awards), gaining her recognition as a talented young actress and marking the start of her film career.
In recent months she has been taking on much more challenging roles, as witnessed in the 2005 horror film Home Sweet Home, where she plays an insane and horribly deformed "phantom" monster who kidnaps a boy from his genetic mother to claim as its own, and was nominated for major awards again.
Self
Yim Hung
Wei
Athena Siu
Suen Ling
Nie Bing
Woo Choy-lam
Cheung Yan
Nancy
Chow Man-fung
Lam Hiu Yeung
Brenda
Jane Chan
Teresa
Maan
Sang Cuihua
Fatt's Mother
丁丁
Yu (segment "Breeder")
Pearl
Mrs Lam
Anna / Siyu
Kong Suet Yee
Emma
Wei Wei
Nova
Bo Kwan
Ricky
Karena
Lily Wang
Ming
Michelle
Shum Chi Ling
Wang Le's wife
Karena
Jill
Self
Inspector Karena Zhang