Jason Herbert (also known as Jason John), (born March 18, 1967 in Coventry, England), is a former band member of the boy band Big Fun (1989–90). He was also the manager of former Spice GirlGeri Halliwell, at Global Talent (2003–04). He has also produced songs for Lee Ryan. He later moved to Rio de Janeiro and put together the boyband P9 in Brazil. Their first album was released in July 2013.