Sammi Hui Cheng Sau-man (; born 19 August 1972) is a Hong Kong Cantopop singer and actress. Sammi is known as one of the most prominent female singers in Hong Kong, with album sales of over 30 million copies throughout the Asia-pacific. Most notably in the 1990s, she was dubbed by the media as the "Cantopop Queen" and diva (Chinese: 天后; literally: "Heavenly Queen"). Having success in over 25 years in entertainment industry, Sammi has also been regarded as one of the most popular Hong Kong artists known in Asia Pacific.