Brinkley, Foster on Polo date

COULD the fifth time be the charm for Christie Brinkley and David Foster?

The supermodel and the music hit-maker — who both are single after having been married four times — were spotted on a date at Ralph Lauren’s Polo Bar on Wednesday night.

The burgeoning couple were such a hit that they even caught the attention of Hillary Clinton, who was dining nearby in an intimate powwow with Lauren.

“Christie and David were on a date, and Hillary came over and greeted them. She gave Christie a warm hug,” a spy told us.

Brinkley and Foster later hit up horn player Chris Botti’s show at the Blue Note Jazz Club, where an- other source described them as “looking cozy.”

An onlooker told us that Botti pulled Brinkley onstage, where she sat behind the drums and impressively played along with the band.

Foster just divorced former “Real Housewives of Beverly Hills” star Yolanda Hadid, who’s mom to top models Gigi and Bella. Brinkley is Billy Joel’s ex-wife and recently broke things off with musician John Mellencamp, whom she dated for a year. She met Foster over the summer at Ronald Perelman’s annual Apollo in the Hamptons benefit, we’re told. But an insider insisted that their Polo Bar dinner was “just a date.”

Meanwhile, we hear that Clinton and Lauren were in “deep conversation” about the election.

“She was spilling the beans,” said a spy, who added that Clinton had a burger, fries and an icecream sundae. “She looked great — she looked back on form,” said a witness. Lauren is a longtime friend of Clinton’s and has designed several of her signature pantsuits.

The source said, “Hillary was blocks away from Trump Tower. The streets were blocked off, the police are everywhere. She walked out the front entrance when she left.” Trump’s ex Ivana is often spotted dining at the restaurant with numerous Trump supporters.

On Tuesday, Hillary and Bill Clinton were out at Rao’s with Harvey Weinstein, Georgina Chapman, and David and Mary Boies.