Jonathan Knight walked off stage in New York on Thursday . Billboard.com also reported that Knight seemed `` visibly out of sync . '' The actor was wearing a black T-shirt with After being asked to sing , he left and did n't return . Knight later posted an apology on his Twitter account .
Jonathan Knight walked off stage in New York on Thursday . The actor was wearing a black T-shirt with After being asked to sing , he left and did n't return . Knight later posted an apology on his Twitter account .