Emma Wu Ying-Chieh was born in 1989; her stage name is GuiGui.In 2005, she made her debut as a singer in the TV show Blackie's Teenage Club. Now she is a singer, actress and host with an extensive cross-disicplinary performing career. In 2016, she signed with a Korean agency, CJ E&M, and released her first solo mini album, GEMMA.She acted in TV series, such as Summer Fever and The Four, and films, such as Days of Our Own and More than Blue.