With the members of their gifted quartet all personally chosen by Frankie Valli to join his iconic band The Four Seasons, Landon Beard, Todd Fournier, and brothers Brian and Brandon Brigham – known collectively as The Modern Gentlemen – headline a highly anticipated Bally's Quad Cities concert on September 30, their repertoire of timeless pop hits including everything from the Beatles' “Help” to the Beach Boys' “California Girls” to the Four Seasons' own “December, 1963 (Oh, What a Night).”