▁surprise ▁appearance ▁on ▁the ▁nin th - season ▁finale ▁of ▁American ▁Id ol . ▁ ▁On ▁ 2 0 ▁November ▁ 2 0 1 1 ▁it ▁was ▁announced ▁that ▁Robin ▁Gib b , ▁at ▁ 6 1 ▁years ▁old , ▁had ▁been ▁diagn osed ▁with ▁li ver ▁cancer , ▁a ▁condition ▁he ▁had ▁become ▁aware ▁of ▁several ▁months ▁earlier . ▁He ▁had ▁become ▁notice ably ▁th inner ▁in ▁previous ▁months ▁and ▁had ▁to ▁cancel ▁several ▁appearances ▁due ▁to ▁severe ▁ab dom inal ▁pain . ▁Robin ▁joined ▁British ▁military ▁tri o ▁the ▁Sold iers ▁for ▁the ▁Com ing ▁Home ▁char ity ▁concert ▁on ▁ 1 3 ▁February ▁ 2 0 1 2 ▁at ▁the ▁London ▁P all ad ium , ▁in ▁support ▁of ▁injured ▁serv ic emen . ▁It ▁was ▁his ▁first ▁public ▁appearance ▁for ▁almost ▁five ▁months ▁and , ▁as ▁it ▁turned ▁out , ▁his ▁final ▁one . ▁On ▁ 1 4 ▁April ▁ 2 0 1 2 , ▁it ▁was ▁reported ▁that ▁Robin ▁had ▁contract ed ▁p neum onia ▁in ▁a ▁Ch else a ▁hospital ▁and ▁was ▁in ▁a ▁com a . ▁Although ▁he ▁came ▁out ▁of ▁his ▁com a ▁on ▁ 2 0 ▁April ▁ 2 0 1 2 , ▁his ▁condition ▁d eter ior ated ▁rapidly , ▁and ▁he ▁died ▁on ▁ 2 0 ▁May ▁ 2 0 1 2 ▁of ▁li ver ▁and ▁kid ney ▁failure . ▁▁ 2 0 1 3 – present : ▁Looking ▁back ▁at ▁a ▁lifetime ▁of ▁music ▁In ▁September ▁and ▁October ▁ 2 0