Dierks Bentley's '90s country cover band, Hot Country Knights, made its debut at the 2015 Country Radio Seminar on Wednesday night (Feb. 25) -- and they called on some famous friends to help make the show one to remember.

Dressed in muscle tees, mullets and plenty of other bygone fashions, Douglas ‘Big Rhythm Doug’ Douglason (aka Bentley) and fellow Hot Country Knights members Trevor Travis, Barry Van Ricky, Shelton Van Ricky, Cade ‘Bonesy’ McCoy, Terotej ‘Terry’ Dvoraczekinsky, Del ‘Monte’ Montgomery and Vinnie ‘Frenzy Fingers’ Pompanelli kicked off their first-ever show with Alan Jackson's 1993 hit "Chattahoochee" (video above). After appearing from behind a sign featuring the band's logo, the guys harmonized and hammed it up on stage, much to the crowd's delight.

However, Bentley wasn't the only country star who couldn't resist the chance to dig out the 20-year-old duds and sing some classic country. Kip Moore (sans costume) stopped by to sing "Dust on the Bottle," made famous by David Lee Murphy in 1995, and Lady Antebellum's Charles Kelley (known for the evening as Ronnie Bunns) joined in for Brooks & Dunn's 1996 smash "My Maria."

Also making appearances were Dallas Houston (Randy Houser) and Shelby Shelton (Miranda Lambert), the latter of whom took the lead on a cover of Shania Twain's "Whose Bed Have Your Boots Been Under?"

Perhaps Bentley will drop a few '90s covers into his setlists on his 2015 Sounds of Summer Tour, which is set to kick off on June 5 in Raleigh, N.C. See all of his upcoming shows here.

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