STATE FAIR Three heavenly singers -- bluegrass/folk thrush Sara Watkins as well as the soulful sister sirens Jevetta and Jearlyn Steele -- will join Garrison Keillor for his seventh consecutive "A Prairie Home Companion" at the grandstand. Expect the affair to extend beyond the usual two hours you hear on the radio. The storyteller extraordinaire likes to explore the nooks and crannies of the fair and spend intermission leading audience sing-alongs. (7:45 p.m. Fri., grandstand, $23 & $28.) (J.B.)
The fair's most left-field entry this year, Dosh is the solo vehicle of veteran Minneapolis drummer and keyboardist Martin Dosh, who's a member of indie-rock hero Andrew Bird's band and has seen his own, mostly instrumental records garner international raves and ample local airplay on the Current and Radio K. He can create a symphony of atmospheric soundscapes and infectious melody/rhythm lines using tape loops and usually just one bandmate, saxophonist/bassist Mike Lewis of Happy Apple and Gayngs notoriety. (7:30 & 9 p.m. Fri.-Sat., International Bazaar. Free with fair admission.) (C.R.)
You may remember Caitlin Crosby from such TV series as "Malcolm in the Middle" and "Living With Fran." But she's also a singer/songwriter whose 2009 CD "Flawz" suggests a Sheryl Crow acolyte who'd fit in on Cities 97 or Lilith Fair. (3:30 & 4:45 p.m. Fri.-Sat., bandshell.) (J.B.)
An alt-country hero, Jim Lauderdale has written hits for George Strait and the Dixie Chicks and recorded with the likes of Willie Nelson and Lucinda Williams. Lauderdale just released his second collaboration with Grateful Dead lyricist Robert Hunter, the intelligent but earthy "Patchwork River." (1 & 2:30 p.m. Fri.-Sat., bandshell.) (J.B.)
It wouldn't be the State Fair without polka. Eddie Blazoncyk and the Versatones are Grammy-nominated heavyweights from Illinois. Maybe they'll be brave and play their football anthem in enemy territory -- "Chicago Cares About the Bears Polka" -- or their unexpected cover of Neil Diamond's "Solitary Man." (3:30 & 4:45 p.m. Sun.-Mon., bandshell.) (T.S.)
Three hitmaking rock veterans -- Steely Dan's Donald Fagen and blue-eyed soul men Boz Scaggs and Michael McDonald (of Doobie Brothers and Steely Dan fame) -- will team up for the awkwardly named Dukes of September Rhythm Revue. Expect R&B chestnuts, songs from the Band and hits from each singer's own catalog. Read an interview with the trio in Sunday's Variety A+E. (7:30 p.m. Mon., grandstand, $45.) (J.B.)
HIP-HOP When Nas and Damien Marley first played First Ave together last summer, it turned out to be one of the more riveting hip-hop performances the club has ever seen, fueled in large part by Marley's jamrocking live band and both vocalists' top-tier MC skills. And that was before they put out a record. The Brooklyn rap giant and the Jamaican music heir are back with a new album in tow, "Distant Relatives," an impressive and thoughtful collection that bridges numerous cultural gaps but sounds born of the same fire and fervor. Expect the new tracks along with older ones from each camp. (9 p.m. Mon., First Avenue. $42.50.) (C.R.)
Hazy, half-baked, free-flowing New Orleans rapper Curren$y was signed to his hometown hero Master P's label as a teenager and later worked with Lil' Wayne's Cash Money Records, but he's still mostly an underground phenomenon. That could change with this month's release of his third album, "Pilot Talk," issued through Roc-A-Fella and largely produced by quirky New York wiz Ski Beatz, with guests including Mos Def and Jay Electronica. (10 p.m. Sun., Karma. 18 & older. $15-$30.) (C.R.)