This movie is a musical biography of the Four Seasons, the rise, the tough times and personal clashes, and the ultimate triumph of a group of friends whose music became symbolic of a generation. Far from a mere tribute concert (though it does include numbers from the popular Four Seasons songbook), this movie gets to the heart of the relationships at the center of the group, with a special focus on frontman Frankie Valli (John Lloyd Young), the small kid with the big falsetto. In addition to...