Roy Rochlin/WireImage; Ethan Miller/Getty Céline Dion attended Coldplay's show at Allegiant Stadium in Las Vegas on Saturday, June 6 While displayed on the big screen, the "My Heart Will Go On" singer was serenaded by the band's frontman, Chris Martin "What an unforgettable evening," Dion said in an Instagram post after the show Céline Dionis stealing the show! On Saturday, June 6, the "My Heart Will Go On" singer, 57, was spotted in the crowd asColdplayreturned to the stage at Allegiant Stadium in Las Vegas for another night of their Music of the Spheres World Tour. "What an unforgettable evening with @Coldplay at @AllegiantStadium…My heart is still singing! 🎶," Dion captioned several snaps shared onInstagram. "A heartfelt thanks to the band and their amazing team for welcoming my family with warmth and kindness. The PEOPLE Appis now available in the Apple App Store! Download it now for the most binge-worthy celeb content, exclusive video clips, astrology updates and more! Brian Prahl / SplashNews She added, "It was all…fantastique❤️" One photo showed "The Power of Love" singer in a huddle with the band, while another captured her deep in conversation with Coldplay frontmanChris Martin. Other snaps in the post included her waving at members of the crowd and making a heart gesture with her hands after appearing on the concert's big circular screen. A fan video shared onXshowed how Martin serenaded Dion once she was displayed. "Well, Celine, my beautiful sister," The "Fix You" hitmaker sang while strumming a guitar. "You make my heart go on and on, near far, you're a total superstar. Let's hear it for the legendary Celine Dion, we love you." Martin's tribute alongside the crowd's applause left Dion visibly emotional. Later in the evening, she returnd to high spirits and even showcased her dance moves. The setlist included Coldplay classics such as "Paradise," "Yellow," and "Clocks." Dion was seen wearing the 3D glasses that fans had been issued for the closing song "Feelslikeimfallinginlove." Cindy Ord/Getty Dion appeared to have been joined at the show by herthree sons— Rene-Charles, 24, andtwins Nelson and Eddy, 14— whom she shared with her late husband,Rene Angélil. Never miss a story — sign up forPEOPLE's free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from celebrity news to compelling human interest stories. Earlier this month Dion spoke to PEOPLE about how her children have inspired her tofight stiff-person syndrome. She was diagnosed with the rare autoimmune and neurological disorder in August 2022, almost six years afterAngélil died from throat cancer. "I barely could walk at one point, and I was missing very much living. My kids started to notice. I was like, 'OK, they already lost a parent. I don't want them to be scared,' " Dion exclusively told PEOPLE. "I let them know, 'You lost your dad, [but] mom has a condition and it's different. I'm not going to die. It's something that I'm going to learn to live with." Read the original article onPeople