Vincent Piazza, Erich Bergen, John Llyod Young, and Michael Lomenda in Jersey BoysJERSEY BOYS

Jersey Boys, Clint Eastwood's film version of 2005's still-running Broadway smash, is a big, bizarre, cornball, clever, terrible, wonderful movie. It's hard to fathom what, beyond its inherent appeal, made Eastwood want to take on the project; this bio-musical about 1960s pop sensations the Four Seasons seems so clearly designed for Scorsese that's it's almost some kind of joke that it instead wound up in the hands of a man who, stylistically and temperamentally, is Scorsese's polar opposite. Yet somehow, astonishingly, the damned thing works. Its parts may be stronger than the whole - at least if you're allowed to cherry-pick the parts - but the film is affecting and entertaining and alive, and exudes more sheer joy than any other title on Eastwood's 43-year directing résumé.