Singer Billy Joel donned a yellow Star of David on his jacket while performing on stage in New York's Madison Square Garden.
Joel, 68, wore the symbol Jews were forced to don in the run-up to and during the Holocaust. They were found on both his lapel and on the back of his suit blazer, People reports.
It is believed the star, who was born to Jewish parents and says he is culturally Jewish, was making a statement against the emboldened neo-Nazi and white nationalism movement.
Both Joel’s daughter, Alexa Ray, 31, and ex-wife, Christie Brinkley, attended the concert and praised Joel for the gesture.
“Now, THIS Is How You Do It,” Ray wrote under a photo of her father wearing the star on Instagram. "THAT’S MY POP!!! Proud Jewish New Yorker Through & Through!!!!! REPRESENT! STAND STRONG. #HellYES #NewYorkStateOfMind #ProudJew #NewYorkStrong #FightForLoveAndInclusion #DiversityMakesAmericaGreat."
"And on the day of the Solar Eclipse a yellow star appeared on the jacket of another kind of star with a clinched fist that seemed to be gripping painful, no excruciating, memories of loved ones who wore that star to their death," wrote Brinkley on her Instagram while including hashtags like "#wealreadyfoughtthiswar#wedidntstarthisfirebutwewillputitout! #nohate".
"May that star also remind you today of the gold stars pinned to the jackets of soldiers for their bravery and valor for fighting an evil so hideous even the gold stars in the sky were afraid to shine," she added. "Thank you Billy for reminding people what was ... so it may never ever be again."
Fans also expressed their admiration.
"Billy Joel doing is encores at MSG on 8/21 wearing one Jewish Star on his breast and another on his back," wrote one Twitter user who attended and took photos of the concert. "He is a true hero."
But that was just one of the political statements Joel made that day.
The star also sang "Goodbye to You" alongside Patty Smyth while a slideshow of Steve Bannon, Sean Spicer and Anthony Scaramucci played.
It comes as a surprise to fans, as Joel usually tries to leave politics out of his shows, according to Rolling Stone.
"I am a private citizen and I have a right to believe in my own political point of view, but I try not to get up on a soapbox and tell people how to think."
When asked about his general demeanor, he replied: "Sometimes I get down in the dumps just like everybody else, but it doesn't make me clinically depressed. There's a couple of times I've gone on drinking binges when I was sad or upset. But it was always a short burst of sadness. I never stayed there."