NEW YORK " For "Jersey Boys" star John Lloyd Young, Frankie Valli is the role of a lifetime. An unknown when he starred in Broadway's Tony-winning best musical hit, Young reprises Valli for Clint Eastwood's film version.It all started at a Sunday matinee, he recalled during a one-on-one interview at the Waldorf-Astoria hotel, when "we heard there was a standing ovation because Clint Eastwood had just entered the thea…
