Dierks Bentley's '90s country cover band, Hot Country Knights, took over a Nashville honky-tonk with surprise musical guests in full costume. The all-star group featured Lady Antebellum's Charles Kelley (aka Ronnie Buns), Randy Houser (aka Dallas Houston) and even Miranda Lambert (aka Shelby Shelton). Check out photos and video of the stars having a blast with their alter egos.