Dierks Bentley's pseudo-90s country-parody band Hot Country Knights has a new member. "Billy Bottoms," AKA Zach Top, made his Knights debut with the band over the weekend during Bentley's "Broken Branches" tour. As country fans know, the Knights occasionally appear at Dierks' shows, and have featured guest appearances by big names like Lainey Wilson, Travis Tritt, Terri Clark and more. With Zach...er, Billy Bottoms, on stage, the band broke into a performance of "Sold (The Grundy County Auction Incident)" by John Michael Montgomery.