But grins get bigger when, moments before the stage curtain drops, the whole crowd turns in unison toward the soundboard as the rumor starts to circulate: Chesney will emerge for the set from an elevating platform below the soundboard. And he does, ripping into one of his several dozen hits before running 100 yards to the stage, as his seven-member band -- four (!) guitars, bass, drums, keys -- saddles the crowd, a polished mechanical bull shaking its surroundings. This is the most grandiose and overwhelming country-music tour since Garth Brooks took Sevens on the road in 1997: To that end, it's an exuberant, to-the-brim spectacle from the genre's biggest star.