Queenzy Cheng Koon Si (Chinese: 庄群施; pinyin: Zhuāng Qúnshī; Pe̍h-ōe-jī: Chng Kûn-si; 26 February 1986 – 28 November 2023) was a Malaysian actress and singer, the member of music group M-Girls.
Following the success of her albums, Queenzy collectively formed M-Girls (四个女生) in 2001 with three other emerging artistes: Angeline Khoo, Cass Chin and Crystal Ong.
[2] In 2017, Queenzy collaborated with Taiwanese model Tom Chang (張瀚元) to release the single titled "Don't Be Shy" (愛).
[5][non-primary source needed] In 2018, Queenzy collaborated with Crystal Ong to reproduce an online single similar to their 1995 album 双星报喜 (Double Stars Bring Luck).
On 28 November 2023, Cheng died from a ruptured brain aneurysm at age 37 while filming a video for a short-form social media channel called "Squad Sekawan".