McGregor’s next fight against Jose Aldo will take place on December 12.
Dave Rooney and Dave Browne are a Dublin duo currently living in Las Vegas and performing regularly at Ri Ra Irish Pub.
The band achieved the Guinness World Record for ’The longest concert’ in 2014, a 114 hour performance.
"Right now he’s probably the most talked about athlete in Ireland at this time," said Rooney.
The single is available on iTunes.