The holiday celebrations started early for Florida Georgia Line and Thomas Rhett. The men shared a party in Nashville on Monday (Dec. 2), toasting both of their recent No. 1 hits.

The event was held at Nashville's Marathon Music Works, toasting both FGL's 'Round Here' and Rhett's 'It Goes Like This.' The party was especially meaningful for Rhett, who co-wrote 'Round Here', along with hit songwriters Rodney Clawson and Chris Tompkins.

Rhett's 'It Goes Like This' was written by Ben Hayslip and Jimmy Robbins, along with his own father, Rhett Akins.

“This is something you can’t even dream up, really,” the proud father tells Country Weekly. “I’ve always wanted to have songs on the radio since I was a kid, but I never dreamed I would have a son who would be in the music business, then write songs with him or for him. Now that it’s happened, it’s still unreal. It feels good to ride down the highway and hear them say, ‘Here’s the new one from Thomas Rhett.’ To hear your own son’s name come out of the speakers and him singing a song that I wrote with my friends is just really, really cool.”

Rhett says helping pen a song that was such a huge success for Florida Georgia Line means as much to him as his own chart-topping success. “I remember getting the demo back on ‘Round Here,’ and the whole day, I knew we had something special,” he explains.

The singer-songwriter adds that he was thrilled to share the music with the hit duo. "‘Cruise’ was out, and we all knew it was going to be a big song," he recalls. "I wanted to be a part of this huge wave of success that Florida Georgia Line was having, and I wanted to have a No. 1 with Rodney and Chris, more importantly. They’ve had about a gazillion [No. 1s], so for me to be on one of them, it’s just a very, very special feeling.”

Florida Georgia Line bandmates Tyler Hubbard and Brian Kelley say they knew the tune was a hit the moment they heard it.

The song marks the pair's third No. 1 hit, but they say it's just as meaningful as the first. “It’s so cool to see a song be so big," Kelley says. "We can take it from here to New York to California and get the same response. That’s crazy, and this one is definitely as special as our first [No. 1].”