Now that’s how you do NSYNC! The Voice star Connor Closs is going viral after he brought his honeyed voice to “This I Promise You”. Fans declared that it was the perfect song choice for the 23-year-old, and we have to agree there! Those high notes at 1:08 were so delectable, and his falsetto at 1:23 was just creamy. Get ready to melt like it’s the year 2000 again! Our boy just crushed The Voice’s Y2K night with this one, with fans declaring it to be the performance of the night.
Closs, who recently got engaged, dedicated the emotional ballad to his fiancée, Sarah, giving the pop standard an authentic, heartfelt spark right from the first note. He certainly has the perfect voice for that classic Y2K boyband vibe. Coach Adam Levine was certainly cooking when he recruited Closs for his team. The young talent did so well here by hitting the big moments with the right level of gravitas, while also managing not to oversing, which is always a big temptation when you are fighting for a place in the next round.
The reaction inside the studio was immediate. Levine declared Closs to be a superstar, praising the rich color of his tone across every register. Critic Andy Swift at TVLine agreed, handing Closs an A+ grade while spotlighting his effortless runs and controlled falsetto. That upper-register polish was no accident. When Closs earned his two-chair turn during the Blind Auditions with Hozier’s “Too Sweet,” he specifically chose Team Adam because he wanted guidance from a vocalist who understood the demands of a high, agile singing range.
Tackling this specific track was also an ideal match for Closs’s real-world musical experience. Songwriter Richard Marx originally penned “This I Promise You” as an enduring romantic oath, and it spent 13 weeks at number one on the Adult Contemporary chart before becoming a permanent fixture at wedding receptions. In his life away from television cameras, Closs fronts the New Jersey events band The Cliffs, regularly performing at weddings and clubs. Leaning into a classic love anthem felt like familiar ground rather than an uncomfortable assignment. See Marx perform “This I Promise You” in a gorgeous duet with NSYNC star JC Chasez that went all kinds of viral.
Viewers quickly rallied behind Closs’s performance online, pushing the video past 171,000 views within its first day on YouTube. Many praised both the song selection and his vocal restraint. As one fan noted, Closs did not just sing the song but “made everyone remember exactly why this song still hits.” Another top commenter said: “Now this is a perfect song choice, he did amazing.”
When the live votes were tallied at the end of the night, Closs secured one of Team Adam’s initial qualifying spots, advancing comfortably into the Top 10 alongside teammate Lexi Stephens. In a high-stakes format where contestants often overdo it to grab quick attention, Closs proved that a well-crafted pop ballad still carries immense power when delivered with genuine feeling and class.