Niall Horan turned Copenhagen's Royal Arena into one giant singalong. On Saturday night, October 10, he performed a lively cover of the band Wheatus' iconic hit 'Teenage Dirtbag' during his 'The Show: Live On Tour'.

A 41-second video of the performance has been capturing fans' attention online, showcasing the former One Direction star leading a packed arena through the beloved early-2000s anthem. The energetic performance was part of the 'Slow Hands' hitmaker's Copenhagen concert in Denmark.

As several videos of the performance circulated online, fans shared their excitement and emotional reactions, with many describing the experience as unforgettable. The atmosphere in the arena was electric, as thousands of fans joined in unison to sing the lyrics of the classic track.

"If only Liam could see this live, he'd be so proud," one fan wrote, sharing a heartfelt sentiment that resonated with fellow One Direction supporters. The mention of the late band member added a layer of poignancy to the evening, reminding fans of the deep bonds within the music community.

Another concertgoer captured the intensity of the moment, commenting, "Was screaming my lungs out!!!" The sheer volume of the crowd singing along was a testament to Horan's enduring popularity and his ability to connect with audiences on a massive scale. A third fan summed up the atmosphere with an emotional message: "What a time to be alive." The concert served as a reminder of the power of live music to bring people together, creating shared memories that last long after the final note is played.

Horan's tour continues to draw massive crowds across Europe, with each stop offering unique moments that fans quickly share across social media platforms. His ability to blend his own hits with nostalgic covers has become a hallmark of his current tour.

The success of the Copenhagen show highlights the global appeal of the Irish singer-songwriter. As he moves to the next city, fans are eagerly anticipating what other surprises he might have in store for his audience.

The viral nature of the 'Teenage Dirtbag' performance underscores the impact of digital sharing in modern concert culture. Fans are not just attendees; they are active participants in documenting and celebrating these musical milestones.

Ultimately, the night in Copenhagen will be remembered as a highlight of the tour, showcasing Niall Horan's charisma and the unwavering dedication of his fanbase as they continue to support him in his solo career.