The two may be divorced, but Christie Brinkley is still Billy Joel's "Uptown Girl".

After spotting his ex-wife in the crowd in his Madison Square Garden concert last Thursday, the 65-year old singer gestured for the camera crew to focus on Brinkley as he sang "Uptown Girl". 

Joel wrote the song for Brinkley, who also starred in the music video of the said 1983 classic. 

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The 60-year old supermodel was all smiles, as she sat in the first row and danced to the songs being sang by her former husband.

Brinkley posted a photo on Instagram of herself from the concert, captioning it with "He's still got it! #msg #franchise #nationltreasure". Her daughter Sailor with ex-husband, Peter Cook, was also in the picture.

Madison Square Garden refers to Joel as a "franchise" early this year. The title means that Joel will be having monthly concerts in the said arean until demand decreases or until the curtains fall on Broadway.

After the photo upload, Brinkley took another snapshot with Joel and her two kids with Cook, Sailor and 19-year old son Jack.

The supermodel took to Instagram a third time to upload a photo of Joel chatting with husband and wife, actor Ryan Reynolds and Blake Lively after the show.

The former couple was married from 1985-1994 and have a 28-year old daughter, Alexa Ray. Alexa Ray Joel is also a singer.

Although the two are no longer romantically involved, Joel and Brinkley have remained close friends throughout the years. In fact, Brinkley continued to stay in touch with Joel's mother.

When the singer's mother passed away last month, Brinkley took to social media to post a tribute to her ex-mother-in law.

"At sad times we look for ways to find the good to lift our spirits, so I have only to imagine what Rosalinda's eyes have seen to find cause to celebrate a life well lived," she wrote. 

TagsChristie Brinkley, Billy Joel, Uptown Girl