Christie Brinkley and David Foster enjoy back-to-back date nights, but it's 'nothing serious,' source says

Looks like a potential relationship is brewing between Christie Brinkley and David Foster!

The 62-year-old supermodel and the 67-year-old GRAMMY-winning musician were spotted together at Ralph Lauren's Polo Bar in New York City on Wednesday night, and were together again the following night, when they went to Madison Square Garden to hear Andrea Bocelli sing. A source tells ET the two were in fact on a date on Thursday, however, there's "nothing serious" between the two just yet.

"[It's] just a date really," the source says of their concert outing. "This is so brand new there is nothing to report at this time."

WATCH: At Home With Christie Brinkley as She Re-Enters the Dating Pool and Shares Passion for Cocktails

See photos of Christie Brinkley through the years:

Coincidentally, Brinkley and Foster were greeted at the Polo Bar by Hillary Clinton, who happened to be at the venue at the same time they were.

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Hilary Clinton saying hi to Christie Brinkley

A post shared by Jon Steinberg (@jonsteinberg) on Dec 14, 2016 at 6:25pm PST

And their night didn't end there. Later, they went to Chris Botti's show at the Blue Note Jazz Club, which Brinkley Instagrammed about.

"It's dreamy, romantic, sexy, and fun, and man can that band play!" she wrote. "It's a joy to watch! PS I got to be guest drummer on one song. #jazz"

But it appears that Brinkley and Foster's dates may have to be put on hold for now. Foster Instagrammed that he was leaving NYC on Friday, which is where the supermodel is based.

Foster has been single since he split from his fourth wife, Yolanda Hadid, in December. As for Brinkley -- who's also been married four times -- she split from musician John Mellencamp in August.

Last November, Brinkley told Howard Stern on his Sirius XM show that musicians were definitely her type. Aside from dating Mellencamp, Brinkley was married to singer Billy Joel from 1985 to 1994.

"I think that artists are the most amazing people because they're constantly creating beauty for the world," the mother of three explained. "With all the crazy stuff in the world, there's artists reminding us of our humanity and reminding us of our heart and soul -- what really matters. So I respect artists so much. I absolutely love music as the ultimate art."

WATCH: Christie Brinkley Speaks Out Against Woman Who Allegedly Peed on Her Property

Interestingly enough, when ET spoke to Brinkley in August, she said she wasn't closing the door on her relationship with Mellencamp. "You never know," Brinkley said when we asked about possibly reconciling with the "Jack & Diane" singer. "Good friendship is the basis for everything, right?"

Watch below:

-- Additional reporting by Carolyn Greenspan