Trịnh Trần Phương Tuấn (born April 12, 1997), better known by his stage name Jack (or J97), is a Vietnamese singer, songwriter, rapper, and actor. He rose to fame during his time in the hip-hop group G5R with "Hồng nhan". Throughout his career, he has received many accolades: three awards at the Green Wave Awards and four awards at the Zing Music Awards. In addition, he was named the Best New Asian Artist of Vietnam at the 2019 Mnet Asian Music Awards and Best Southeast Asian Act at the 2020 MTV Europe Music Awards, and received the 26th Golden Apricot Blossom Award (2020) for Best Light Music Male Singer. He is also the first Vietnamese artist to win an Asian Television Award for Best Music Video Act with "Hoa hải đường".