Question: Who was the Hong Kong singer and actress who contributed to the Cantopop music scene, became  an idol during her career, and appeared in "July Rhapsody?"
Sentence (from "July Rhapsody"): The film follows Lam Yiu-kwok (played by Jacky Cheung), a Hong Kong secondary school teacher, and explores his struggles with midlife crisis, marriage and seduction by a female adolescent student.
Relevant evidence: No