Karsin Bak aka Karsin Berthel is a Hong Kong singer and film actress of Chinese and German descent, most active around the mid-1980s to 1990s.

Bak originally debuted as the lead singer of the band Borderline (邊界樂隊), which won first place at the 1986 Hong Kong Carlsberg Pop Music Festival.^[1] Borderline recorded two LPs before disbanding, with Bak going onto form the band Purple Heart and eventually launching a solo career in 1993. As a solo artist, she collaborated with Sandy Lam on "I Don't Hate No One" (我沒有恨誰), which was a Cantonese cover version of Wilson Phillips' 1992 single, "You Won't See Me Cry."

As an actress, she has appeared in 14 films since 1990,^[2] most notably in Teddy Chan's 1994 Category-III film, Twentysomething.

Early life

Bak studied Fashion Design at the Hong Kong Polytechnic Institute.^[3]

Discography

Borderline

• 1987: Borderline (發條愛情)
• 1989: Going Underground (地下旅程) [*Promo Only, Commercially Unreleased]

Purple Heart

• 1991: Beyond Borderline (超越邊界)

Solo

• November 1993: I Have Myself (我有我)

Filmography

• Look Out, Officer! (1990)
• Twentysomething (1994)
• In the Heat of Summer (1994)
• Only Fools Fall in Love (1995)
• Hong Kong Graffiti (1995)
• Happy Hour (1995)
• Heaven Can't Wait (1995)
• Those Were the Days (1996)
• Troublesome Night (1997)
• 97' Lan Kwai Fong (1997)
• Expect the Unexpected (1998)
• Moonlight Express (1999)
• The Kid (1999)
• Everyday Is Valentine (2001)