Robin Roberts signed off from Good Morning America with some sad news on Tuesday when she revealed the tragic loss of someone very special .The GMA presenter sat alongside her co-host, T.J Holmes, as they made the announcement which had fans welling up. MORE: Robin Roberts and partner Amber tease new arrival at family homeRobin paid tribute to a much-loved member of the team who passed away on Sunday and she shared the tribute on Instagram along with a heartfelt message. WATCH: Robin Roberts and