The Die a Happy Man star was among the performers at the annual Philadelphia, Pennsylvania event in early September (16), and, thanks to his manager's connections, was able to score an invite to the hip-hop superstars' private area backstage.
"We somehow got past security and we were there on Beyonce's birthday, taking a shot with Beyonce for her birthday!" he recalled to People.com. "Me and Lauren were like, 'Is this real life?'"
Thomas has since crossed paths with Jay Z again, and he is flattered the rap icon knows his name.
"Now to actually see Jay Z and him being like, 'What's up, man?' And he knows who you are?! It's a really, really cool feeling," he gushed. "He's a really wise person, him and Beyonce both - they are so smart and just genuinely kind people."
Earlier this month (Nov16), Beyonce and her husband stepped into Thomas' world as the R&B singer joined the Dixie Chicks for a surprise performance of her country-tinged track Daddy Lessons at the CMA Awards in Nashville, Tennessee, and Rhett, who also hit the stage at the prizegiving, loved seeing the two music genres collide live.
"It's insane that they were at the CMA Awards," he smiled. "Not only did we have country music royalty here, but to have hip-hop royalty in the house was crazy."
Not everyone was a fan of Beyonce's appearance - many country music fans took to social media to criticise show producers for allowing the superstar to close the show, while some posts had more racist undertones, insisting the African-American beauty didn't belong at the CMAs.