Michael Strahan was an important part of the incredible celebration that took place on Times Square on Thursday morning for co-star Robin Roberts.MORE: Michael Strahan's daughter makes runway debut – and he's so proud!He joined in with the ABC cast to celebrate 20 years of Robin on Good Morning America, and also was part of a series of tribute messages for the TV personality.VIDEO: GMA's Robin Roberts and Michael Strahan are friendship goalsHe even made Robin emotional when he relayed the story of how she supported him when he first joined the morning news show."I was feeling overwhelmed," he mentioned as he opened up about his early days on GMA.