Ethel Merman movies

A group of motorists witnesses a car crash in the California desert, and after the driver's dying words indicate the location of a hidden stash of loot, they turn against each other in a race across the state to get to it.

Molly and Terry Donahue, plus their three children, are The Five Donahues. Son Tim meets hat-check girl Vicky and the family act begins to fall apart.