Wilco [ tickets ] frontman Jeff Tweedy reportedly has checked himself into a Chicago rehab clinic for treatment of an addiction to painkillers that he developed while battling migraine headaches.

The Chicago Tribune reported this week that Wilco has called off a promotional trip to Europe so that Tweedy can undergo treatment.

Nonesuch Records has postponed by two weeks the release of the band's forthcoming album, "A Ghost is Born," to June 22.

A judge in Tucson, AZ, has reportedly reversed a previous order that called for Diana Ross [ tickets ] to return to Tucson to serve 48 consecutive hours in jail.

Ross, who pleaded no contest to a DUI charge in February, was supposed to have served her sentence in her hometown of Greenwich, CT, but the judge initially found that she didn't spend 24 consecutive hours in jail, as Arizona law requires.

The judge relented after it was determined that Ross spent 22 1/2 hours in jail in Greenwich between Feb. 9 and Feb. 10, and was released 1 1/2 hours early because no female guard was on duty.

Bob Dylan [ tickets ] will headline this year's Fleadh festival, set to take place on July 20 at Finsbury Park in London.

Pop-rockers Sugar Ray [ tickets ] have signed on to promote the launch of the new 2004 Kia Spectra compact sedan with a multimedia campaign that includes a tour sponsorship and a reality-TV series.

According to a press release, Sugar Ray's involvement will include "a six-episode reality-TV series tentatively titled 'On the Road' which will be filmed during Sugar Ray's upcoming 18-market U.S. concert tour and will involve the band members and a major record label."

The Kia-sponsored show, which will appear on the Spike TV cable network in June and July, "will track eight young hopefuls as they compete for the opportunity to land a job with a major record label."

During the competition, contestants will provide support for various aspects of Sugar Ray's tour, which launches on April 8.