“‘YOU CAN FAKE GOOD VOCALS… BUT YOU CAN’T FAKE THAT KIND OF JOY ON STAGE.’” That reaction is spreading fast online after Celtic Thunder’s explosive live performance of “The Boys Are Back in Town” in Dublin, with fans insisting Keith Harkin didn’t just perform — he looked like a man completely lost inside the happiest moment of his life.

With energy, humor, and a healthy dose of rock and roll, Celtic Thunder lit up the stage with a live performance of “The Boys Are Back in Town” that had the Dublin crowd roaring.

The Irish singing group, known for blending powerhouse vocals with personality-driven stage presence, delivered the Thin Lizzy classic with an unexpected comedic twist.

Keith Harkin, in particular, looked like he was having the time of his life, exchanging laughs with the other members while still hitting every note with precision. The chemistry between the performers was undeniable, and it created an atmosphere that felt less like a concert and more like a massive celebration.

Celtic Thunder 'It's Entertainment' - YouTube

From the first guitar lick to the final chorus, the crowd was captivated. Fans in the audience and online praised the group’s ability to make the song their own while keeping the raw energy that made the original so iconic.

“WHOOP WHOOP WHOOP CELTIC THUNDER YOU ALL ROCK,” one fan wrote, while another gushed, “Awesome! Love this song. Love these guys. Ryan is a heartthrob.” Others were struck by the nostalgic charm of the performance, with one viewer saying, “I’m loving their music after hearing my Dad listening. I miss him very much.”

The comments section quickly filled with love for the group: “Keith, you look like you’re enjoying yourself,” “Keep the music coming, Celtic Thunder!!” and “Fantastic rendition!” were just a few of the sentiments shared by fans around the world.

Celtic Thunder Mythology | KPBS Public Media

It’s clear that for Celtic Thunder, this was more than a cover—it was a joy-filled, crowd-pleasing reminder that rock classics never go out of style.

About “The Boys Are Back in Town”

Originally released in 1976 by Irish rock band Thin Lizzy, “The Boys Are Back in Town” became an international hit and remains one of the group’s signature songs.

Written by frontman Phil Lynott, the track was inspired by the camaraderie of old friends reuniting and the electric energy of nights out on the town. With its driving guitar riffs and instantly recognizable chorus, the song has been celebrated as an anthem of rock nostalgia.

Celtic Thunder-cruise 2013

Celtic Thunder’s performance not only honored its Irish rock heritage but also infused the classic with their own brand of theatrical charm—reminding audiences why this song continues to resonate nearly five decades later.