Sigh. It was only yesterday (literally!) that Billy Joel, 60, was reported ready to buy his wife of five years, Katie Lee Joel, 27, her own Sag Harbor restaurant. And now the Daily News reports that the Joels are divorcing. They stick in a bunch of stuff about some fashion designer she’s supposed to be having an affair with, but we refuse to believe it. As Tribe Chef says, “She looks like Mila Kunis. He looks like an ex-cop from Nutley” — clearly a match made in heaven. Maybe now Joel will go off the wagon and write some of that dark, angst-ridden shit we know he’s got deep inside. It’ll be like Tonight’s the Night, only jazzy.