Pedophile and disgraced British rock star Ian Watkins was slaughtered in his jail cell Saturday. Another convict ambushed the singer and used a shank to slash the 48-year-old’s throat after the cells at HM Prison Wakefield were unlocked for the morning, sources told The Sun. The ex-Lostprophet frontman’s jugular was severed and he succumbed to blood loss. “Watkins has been killed in the most brutal way possible – and the attack was shocking, even by prison standards,” the source told the outlet.