Indie-rocker-turned-pop-rocker Liz Phair [ tickets ] will road-test some new songs during a series of acoustic club dates set for July and August.

According to an announcement on her official website, Phair's setlists for the nine-city tour will also feature material from her first four albums. She's expected to release a new album in September.

Prior to the acoustic tour, Phair will make a July 23 appearance at the Lollapalooza festival, which takes place at Chicago's Grant Park.

Phair's most recent album was her self-titled 2003 release, which peaked at No. 27 on The Billboard 200 album chart. It spawned the Top 20 single "Why Can't I," which was co-written by The Matrix.

The former lo-fi rocker--who became a critical darling upon the release of her 1999 debut, "Exile in Guyville"--enlisted slick producers and several guest musicians for the 2003 album, including Mike Elizondo (Dr. Dre's bassist and co-writer/producer of 50 Cent's hit "In Da Club"), drummer Matt Chamberlain (Tori Amos, The Wallflowers), bassist Wendy Melvoin (Prince and the Revolution) and Pete Yorn.