Billy Joel sings ‘Uptown Girl’ to ex Christie Brinkley at MSG — and their daughter performs

Sing her a song, you’re the piano man!

Billy Joel serenaded ex-wife Christie Brinkley during a concert on Friday at Madison Square Garden, where the musician has long had a popular residency. 

A video posted to TikTok showed the model, 70, smiling and dancing along to “Uptown Girl” — up on the jumbotron, for all to see — as Joel sang the hit 1983 song that will be forever associated with Brinkley.

Joel, 74, was partly inspired to by Brinkley when he was writing the tune — and while dating then-girlfriend Elle Macpherson. 

Brinkley, who Joel was married to from 1985 to 1994, famously appeared in the “Uptown Girl” music video. The pair have a daughter, Alexa Ray Joel, 38, who also hopped onstage and sang with her dad Friday.

The duo performed “To Sir With Love” and “Say Goodbye to Hollywood,” Us Weekly reported.

This wasn’t the first time Brinkley has supported her ex at MSG. 

Nearly 10 years ago, she sat front row at the concert, along with another former husband, Peter Cook, and her daughter Sailor Brinkley Cook, 25. Like last week, Instagram videos showed her beaming as Joel played “Uptown Girl.”    

Brinkley, who has tied the knot four times, never remarried after breaking things off with Cook.

“There just doesn’t seem to be anybody out there,” she told People in January. “I am pretty comfortable with my life the way it is, so, que será, será!”

Since 2015, Joel has been married to Alexis Roderick, 41, with whom he shares two daughters.