When Florida Georgia Line played their sold-out show at Nashville's Bridgestone Arena on Thursday night (Oct. 13), they set out to take the crowd on a journey, and that's exactly what they did. The Dig Your Roots Tour show was a fire-filled party of hits, singalongs and special guests.

The journey began with the rev of a truck engine and truck lights shining through an Old Camp Whiskey curtain. When the curtain fell, ear-piercing screams met Tyler Hubbard and Brian Kelley, who were lowered from platforms to the stage to sing "This Is How We Roll" as flames rose from behind them. They rotated jumping from the beat of songs like "Anything Goes" to grabbing their guitars for "Round Here."

Florida Georgia Line sang "Dig Your Roots" — one of their favorite songs and the title track of their Aug. 28 new album — with inflatable trees swaying behind them. BK took a spot at the front of the stage for the track, while Tyler Hubbard hung back a little. "Let's go on a journey," Hubbard said to introduce the song before the duo said they'd be taking fans through their lives.

Fans were really in for an intimate treat when the duo took a small stage near the soundboard and slowed things down. There they played "Dirt" and "H.O.L.Y.," which they dedicated to their wives. At the song's close Kelley and Hubbard took the crowd back — way back — to their first concert ever: the Backstreet Boys.

Then, the five-piece boyband surprised the crowd on the big stage. The screams were deafening. They sang "Everybody (Backstreet's Back)" as FGL made their way back to the stage to join them for "God, Your Mama and Me," their collaboration on Dig Your Roots. BSB's AJ McLean summarized the surprise appearance well, saying, "I think we just created the first country supergroup."

Florida Georgia Line had other tricks up their sleeve, welcoming fellow country superstar Jake Owen on stage for "Sundaze" before an epic encore. FGL closed the night out with the last surprise guest, rapper Nelly, who performed a couple of his solo songs before he joined BK and T-Hubb for the remix of their breakout hit, "Cruise."

"We're so thankful for you guys ... Thank y'all for changing our life," Hubbard said at the close of the show, giving Kelley a big bro hug. "Keep spreading the love."

The Songs, the Live Show, the Confession ...