Rascal Flatts are getting ready to kick off a string of concerts in Sin City, and they promise a show that is different from anything they've given their fans in the past.

“If you’ve seen us the last eight years, you won’t see us like you’ll see us in Vegas," guitarist Joe Don Rooney says of their Rascal Flatts Vegas Riot! residency, a nine-show run that begins on Feb. 25 at the Joint inside the Hard Rock Hotel and Casino in Las Vegas.

"I love the fact Hard Rock called us -- we’re the first country artist at the Joint," Rooney continues. "It says a lot about what they think of Rascal Flatts and also what they think of country music in general.”

The Riot! shows will feature Rascal Flatts' hits from the past 15 years, as well as new songs. The trio will also be joined by a new band.

“You’ve gotta evolve with your albums, and we felt like it was time to do that with our live show," Rooney says, "and especially going into Vegas, it felt like the right time to make this change."

As on previous tours, the Flatts' will weave a cover song into their Vegas sets, and while they wouldn't reveal the title, Jay Demarcus is giving out hints.

“It was a big hit by the Bee Gees, and then Michael Bolton made a remake out of it that’s really nice," he says. "And it sounds lovely with three female background singers.”

Based on those clues, the tune could be "To Love Somebody," a Top 20 hit for the Bee Gees in the U.S. Bolton released his version of the song in the early 1990s, and Hank Williams, Jr., has also covered it, among many others.

Rascal Flatts are up for Vocal Group of the Year at the 2015 ACM Awards, which will be held in April. After their shows in Las Vegas, they'll be hitting the road for their Riot Tour 2015 with Scotty McCreery and RaeLynn.