The big gigs: Trampled by Turtles, Chaka Khan/Michael McDonald

While it doesn't have an official festival name, this outdoor gig is unofficially one of Minnesota's best festivals of the year, with its unbeatable lakeside location and all-local lineup in the city that birthed the ever-popular acoustic sextet. Trampled is once again making room for this gig amid another busy summer of festival and amphitheater dates, including Red Rocks later this month. Joining the harmonious pickers this time are Duluth's violin-bowing folk hero Gaelynn Lea, country twang maestro Erik Koskinen, Twin Cities indie-rockers Zoo Animal and Early Eyes, Pert Near Sandstone's Adam Kiesling and Ojibwe music legend and activist Keith Secola. (3:30 p.m. Sat., Bayfront Festival Park, downtown Duluth, all ages, $30, eTix.com.)

CHRIS RIEMENSCHNEIDER

She was not in great voice last summer at the Minnesota Zoo, but the cranberry-haired "Tell Me Something Good" R&B siren has found the right disco-y soul spot on "Hello Happiness," a new seven-song album. Raspy-voiced piano man McDonald is always spot-on, whether exploring the Motown catalog or his own hits, including "What a Fool Believes," "I Keep Forgettin'" and "On My Own." A smartly packaged double bill of multiple Grammy winners. (7 p.m. Sun., Mystic Lake Casino Showroom, Prior Lake, $49-$99. 952-445-9000 or ticketmaster.com)

JON BREAM