Detroit rocker Kid Rock [ tickets ] has recorded a batch of songs for a new album, and is currently mixing them in Los Angeles, according to Atlantic Records.

Rock is self-producing the as-yet-untitled set, which is due out this fall. He plans to support the release with a world tour.

Limp Bizkit [ tickets ]'s Saturday (7/26) night set at the Summer Sanitarium tour's Chicago-area stop came to an early end after frontman Fred Durst was pelted with debris and subjected to a chorus of boos and chants, the Chicago Sun-Times reports.

Durst--after reportedly fanning the flames by "encouraging the catcalls and flying trash, then swerving into a bizarre tirade against the crowd and city"--stormed off the stage 20 minutes into Limp Bizkit's set.

Wrote Sun-Times reviewer Anders Smith Lindall: "Had the villain in 'The Wizard of Oz' been a vile little boob like Durst rather than a snarly old lady in greenface, the movie's 'I'm melting!' scene might have looked like this."

Britney Spears [ tickets ] and Mary J. Blige [ tickets ] will perform a free concert on the National Mall in Washington, DC, on Sept. 4 to kick off the NFL season, according to Billboard.com.

ABC-TV will broadcast the concert--which reportedly will include a tribute to the U.S. military--before the Washington Redskins and New York Jets play the first NFL contest of the season that night.

Kevin Richardson of the Backstreet Boys [ tickets ] resumes his role in the touring musical "Chicago" on Aug. 6 in San Francisco. He will portray Billy Flynn, the shady lawyer.

Richardson will also travel to London with the production in September.