Singer-songwriter Mick Konstantin is now in Vegas ahead of Conor McGregor's boxing match with Floyd Mayweather.
The Kildare man's flights were paid for by the UFC champion, while he also splashed out for Mick's tickets to tomorrow nights fights.
Irish fans have made their voices heard in Vegas this week.
This time, the fans in attendance have a new song to sing thanks to Mick.
The UFC caught Konstantin performing his track with an army of fans belting it out with him.
Meanwhile, in the early hours of this morning, it was announced that Imelda May will perform Amhrán na bhFiann before the fight.
She broke the news on twitter: