Trịnh Trần Phương Tuấn (born April 12, 1997), better known by his stage name Jack, is a Vietnamese pop singer, songwriter and rapper. He became famous when working in the group G5RSquad and released the song "Hong Nhan". Throughout his career, he has received many awards: three awards at the Green Wave Awards and four awards at the Zing Music Awards. 
 In addition, he was awarded the "Best New Asian Artist of Vietnam" at the Mnet Asian Music Awards 2019 and Best Southeast Asian Act at the 2020 MTV Europe Music Awards. Jack is recognized the highly prestigious award: The 26th Golden Apricot Blossom Award (2020) for Most Favorite Light Music Male Singer. He is also the first Vietnamese artist to win an Asian Television Awards for Best Music Video Act (with Hoa Hải Đường).