Wu Si-Hsüan (Chinese: 吳思璇; pinyin: Wú Sīxuán; Wade–Giles: Wu Si-Hsüan; born January 10, 1988 in Taiwan), better known in Japan as Shen Shen (シェンシェン?) is the leader of the latest Hello! Project group Ice Creamusume. She was announced as a winner of the Taiwan Hello! Project New Star Auditions on September 20, 2008 along with the other members of Ice Creamusume.
In 2007, Hello! Project producer Tsunku announced his plans to start a Taiwanese audition to find new talents to help the company's expansion into Asia. The winners would become a part of a new Hello! Project group. There were six winners, including Wu Si-hsuan, were formed into the group Ice Creamusume. Singing in both Taiwanese and Japanese, the group debuted in 2009 with their mini-album 1st Best!, released in January.
She took part in Taiwanese singing contest One Million Star. Fellow Hello! Project member Li Chun is believed to have taken part in this competition at some stage.