George Strait is getting set to wrap up the 2013 leg of his two-year farewell tour in his home town of San Antonio, but he'll be back next year -- and 'warns' fans to expect the unexpected.

In fact, fellow superstar Kenny Chesney might be involved. “We’ve got some surprises up our sleeve, so next year’s gonna be fun," Strait tells Country Countdown USA's Lon Helton.

Though he doesn't say exactly where or when Chesney might figure into those plans, Strait adds, "Kenny and I have been friends for a long time; we worked together in the stadium days, and other times, too. Don’t be surprised if you see him out next year with us somewhere. We’ve got some big plans.”

The pair recorded together on 'Shiftwork,' a No. 1 duet from 2007. Prior to that, Strait recalls that Chesney and Tim McGraw were touring with his George Strait Country Music Festival in 2000 when they pulled an infamous stunt that got them arrested. Chesney was reportedly riding a police officer's horse backstage without permission, and when two officers tried to stop him, McGraw and his manager stepped in. A small scuffle ensued, and both stars were jailed. They were later cleared of all charges.

“I was there fixin’ to go onstage in Buffalo when he and Kenny got thrown in the pokey," Strait recalls. "It was so funny because I got the word the police had them right as I was walking on stage. It was a heck of a night waitin’ up for those guys to get back in.”

If Chesney does show up on some upcoming dates with Strait, fans can only hope no fights break out. Meanwhile, Strait will perform at the Alamodome in San Antonio on June 1. He will resume the Cowboy Rides Away Tour next year before retiring from the road, but not music as a whole.

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