Being the Celebrity Apprentice didn't seem to help country music star John Rich yesterday, after he got 86'd from a Southwest Airlines flight from Las Vegas to Nashville. Evidently, Rich got into a verbal argument with a couple of passengers BEFORE boarding the plane ... and continued to display drunken behavior once he was allowed inside the main cabin.

I'm thinking that John, who is a really, really nice guy, by the way, was in Vegas to perform during the National Finals Rodeo, and was just trying to carry the party back home to Nashville. Maybe next time he should get a driver? Or charter his own plane? Just sayin'.