Tucked in there on Sunday is the biggest hit-maker of them all, the veteran multi-platinum country group Lonestar, which is bringing its “Keeps Getting Better” tour to General Duffy’s. If Lonestar just keeps getting better, then that’s worth shouting about, because they’ve had a pretty impressive past three decades. 1 hits on Billboard’s country chart, including “I’m Already There,” “What About Now,” “My Front Porch Looking In,” “Mr. 1 on the country chart, it also reached No. Lonestar, with Jimmy Parker: 6:30 p.m. Sunday, Aug. 16, doors open 5 p.m., $55.15, General Duffy’s Waterhole, 404 SW Forest Ave., Redmond, generalduffys.com.