Some might say a long celebrity marriage is one that endures the duration of the newly betrothed's trip down the aisle. We've seen Britney Spears dissolve a marriage after 55 hours and Kim Kardashian call it quits after 72 days. It seems even money can't buy matrimonial happiness.
But some couples have been together for 50, 60 years and say they're still as much in love as they were the day they spoke their "I dos." What do they know that others do not?