Blake Shelton and Christina Aguilera joined forces for a powerful live performance of her song “Just a Fool,” a moment that took place more than a decade ago. Back in 2013, during season five of The Voice, the two served as rival coaches, each fiercely advocating for their own team members to claim victory.

But when the spotlight turned to them, all competition faded away. On stage, their voices blended seamlessly, showcasing not just their talent but their ability to connect as artists. Check it out in the video below, which has garnered over 99 million views on YouTube and the number never stops:

Christina Aguilera kicked off the emotional ballad seated in the middle of the crowd. Her soulful voice commanded attention as the audience swayed along, hands moving in rhythm. It felt like a moment from a classic rock concert, with anticipation building for what came next.

Blake Shelton soon joined her, also seated among the audience, but it wasn’t long before the two began moving toward each other. Meeting center stage, they locked eyes and delivered a heartfelt duet. Aguilera’s rich, powerful tone blended effortlessly with Shelton’s country twang, creating a performance filled with chemistry.

Their chemistry on stage was undeniable, with each note perfectly complementing the other. The performance ended with a celebratory high-five, a small but telling gesture that showed their mutual pride in how seamlessly their voices blended.

Their collaboration enchanted not only the live audience there but viewers online. While Christina’s vocal was so thunderously amazing, Blanke’s voice blew many away. A person said, “What blows me away is how the majesty of Christina’s voice pulls up a quality in Blake’s voice that I didn’t know he had! They work WELL together.”

Another continued, “She is about the best vocalist, most people know this but DAMN, Blake sounded so good with her. He kept right up along with her in the vocals in this song. They sound really great together.”