Iconic singer Frankie Valliwas seen for the first time since he insisted nobody was forcing him to perform at his age. RadarOnline.com can reveal the Four Seasons singer has tried to show strength in his dying days despite a viral video showing him lip syncing to his own music. Valli, 90, was seen wearing a light blue button-up shirt, blue jeans and a grey jacket as he walked through a parking lot hugging several people. The aging crooner was spotted leaving breakfast with his family at Nat’s Diner in Woodland Hills, California, on Tuesday, October 1. Before the breakfast outing, he was seen v…