Question: Ann Mui was the older sister to what singer and actress who had major contributions to the Cantopop music scene?

full_context: Document 1: Hibari Misora: Hibari Misora (美空 ひばり , Misora Hibari , May 29, 1937 – June 24, 1989) was a Japanese singer, actress and cultural icon. She received a Medal of Honor for her contributions to music and for improving the welfare of the public, and was the first woman to receive the People's Honour Award which was conferred posthumously for giving the public hope and encouragement after World War II.
Document 2: Ann Mui: Ann Mui (梅愛芳) (13 January/12 December 1959 – 16 April 2000) was a singer and actress. She was the older sister of Hong Kong actress and singer, the late Anita Mui and two brothers. Her mother remarried after her father died. Despite not being twins, their singing voice is strikingly similar, with the only way to tell them apart was the hand in which they hold the microphone. She is best remembered for her supporting roles in many movies, especially Jackie Chan's "Police Story 2". She died of cervical cancer, which was proven to be genetic as Anita later died for the same reason. Ann left behind a husband, Lap-Tak Poon, and two sons. Like Anita, she has a dramatic contralto singing voice, which is a rarity in Chinese pop music.
Document 3: Miki Yeung: Miki Yeung (born 14 February 1985) is a Hong Kong cantopop singer and actress. In 2002, she joined the cantopop music idol group Cookies. In 2005, her film "b420" was awarded the Grand Prix Award: The 19th Fukuoka Asian Film Festival. Currently she is the TV hostess of the programme "" for the J2 channel. In 2012, she signed an artiste contract with TVB.
Document 4: Kate &amp; Anna McGarrigle: Kate McGarrigle (February 6, 1946 – January 18, 2010) and Anna McGarrigle (born December 4, 1944) were a duo of Canadian singer-songwriters from Quebec, who performed until Kate McGarrigle's death on January 18, 2010.
Document 5: Alan Tam: Alan Tam Wing-lun MH (; born 23 August 1950) is a Hong Kong singer and actor. He played a major role in developing the Cantopop scene in the 1980s as he was known for singing romantic ballads with modern arrangements. Today, he is still active in the music and film industry, releasing new albums on a regular basis. Since the late 1980s, he has served as a mentor for the cantopop music industry, earning the nickname the "Principal" or "Principal Tam". Today he is regularly seen across the media in Hong Kong, mainland China, Taiwan, and various parts of East Asia participating in all types of entertainment related events and charity activities. As of 2013, Alan Tam has launched total 115 solo albums and has sold over 35 million records worldwide, he is also holding the record for having the most concerts in Hong Kong as a solo artist.
Document 6: Kate McGarrigle: Kate McGarrigle, CM (February 6, 1946 – January 18, 2010) was a Canadian folk music singer-songwriter, who wrote and performed as a duo with her sister Anna McGarrigle.
Document 7: Susanna Kwan: Susanna Kwan Kuk-ying (born May 3, 1958) is a Hong Kong singer and actress. She has recently been an actress for a number of TVB shows. Her nickname is "Big Doll" or "Small Sworn Mother" (as her performance in Wong Sau-kum of "Heart of Greed"). She had been married to Lai Siu-tin followed by a divorce. From February 5, 1990 to January 1, 2006, she lived in Canada. On January 2, 2006 she returned to Hong Kong because TVB invited her to be the host of a singing program. In July 2015, Susanna ended her 8-year relationship with TVB.
Document 8: G.E.M. (singer): Tang Tsz-kei (; born 16 August 1991), better known by her stage name G.E.M. (an abbreviation of Get Everybody Moving), is a Chinese singer-songwriter based in Hong Kong. She debuted her singing career by releasing the self-titled EP "G.E.M." in 2008. In 2012, she released the album "Xposed", and won a Hong Kong Top Sales Music Award for the Best Sales Local Female Vocalist. In 2014, she appeared on Chinese singing competition program "I Am a Singer" (season 2), and then gained popularity in Greater China. In the same year, she won a Nickelodeon Kids' Choice Award for Favorite Asian Act. In 2015, she was ranked eleventh on the "Forbes" China Celebrity 100. In 2016, she became the only Asian artist featured in the "Forbes" 30 Under 30 (Music).
Document 9: Mimi Chu: Mimi Chu (, born Choo Yit Mei ) is a Malaysian-born Hong Kong actress and singer. She lived in Singapore before moving to Hong Kong. She has appeared at many events. As an actress, she is a recognised face in Hong Kong and Southeast Asia having appeared in both Hong Kong and Singaporean productions.
Document 10: Myolie Wu: Myolie Wu Hang-yee (born 6 November 1979), is a Hong Kong actress and singer. Born in Hong Kong with Guangdong Taishan ancestry, she is signed under for the Hong Kong TVB television station and a singer under contracts with Neway Star. She has twice won "My Favorite TV Actress" at the Astro Favorites Awards Ceremony. She has also won "Best Actress" for her role in Curse of the Royal Harem, a TVB grand production, "Most Favourite TV Female Character" for her role in Ghetto Justice and also won "Extraordinary Elegant Actress" at the TVB Anniversary Awards 2011, making her the first ever Triple TV Queen of the year. By summer of 2015, Myolie left TVB to explore new avenues.
Document 11: Anita Mui: Anita Mui Yim-fong (; 10 October 1963 – 30 December 2003) was a Hong Kong singer and actress making major contributions to the Cantopop music scene and receiving numerous awards and honours. She remained an idol throughout most of her career, and was generally regarded as a Cantopop diva.
Document 12: Angelababy: Angela Yeung Wing (born 28 February 1989), better known by her stage name Angelababy, is a Chinese model, actress, and singer based in Hong Kong. Her stage name came from the combination of her English name "Angela" and her nickname "Baby". In 2013, she was chosen by "Southern Metropolis Daily" as one of the New Four Dan Actresses. In 2016, she won the Hundred Flowers Award for Best Supporting Actress for her role in the blockbuster film "".
Document 13: Anna McGarrigle: Anna McGarrigle, CM (born December 4, 1944) is a Canadian folk music singer and songwriter who wrote and performed as a duo with her sister, Kate McGarrigle, until Kate's death in 2010.
Document 14: Jody Chiang: Jody Chiang or Jiang Hui (), born Jiang Shuhui (), is a Taiwanese popular singer. She began recording in the 1980s and retired in 2015, having released 60 albums. Her trademark ballads and folk songs are typically sung in Taiwanese. Her role in Taiwan's popular music scene is often compared to that of Teresa Teng. She is the older sister of Chiang Shu-na.
Document 15: Sammi Cheng: Sammi Cheng Sau-man (; born 19 August 1972) is a Hong Kong singer and actress. She is 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, Cheng has also been regarded as one of the most popular Hong Kong artists known in Asia Pacific.
ground_truth: Anita Mui