Ah Sa & Signing Autograph Party

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Ah Sa and her father at a signing party for her recently published autobiography "Single parent love" on Thursday, July 24, 2008. [Photo: ent.QQ.com]

Half of the Hong Kong pop duo Twins, Ah Sa or Charlene Choi, held a signing party for her lately published autobiography "Single parent love" on Thursday, according to ent.QQ.com.

The books, authored by Charlene Choi and her father, sold out just two days after being released. The autography is illustrated by pictures of her father, who said he fell in love with a beauty of mixed-heritage. A picture of her first boyfriend, whose face is covered by a cartoon character, is published in the book.

Some friends of Charlene Choi, who grew up in a single-parent family, have composed prologues for the book, including her partner Gillian Chung in the singing group Twins.

Charlene Choi said she is planning to write a book with her mother. She sang a song "Younger sister" for her mother in her new album which was released in January this year