Previously unreleased tracks from Weezer and Ben Kweller, plus songs from Phantom Planet and AM Radio, will compose a double-seven inch single benefiting former That Dog violinist Petra Haden. Titled simply "A Benefit for Petra Haden," the project is being issued by Orange County, Calif.-based independent label Vegas Records, and will include a live version of Weezer's "Why Bother" (captured in Atlanta on Aug. 12, 2002), Kweller's "It's Not There," Phantom Planet's "Always on My Mind," and the AM Radio cut "Becoming You."

In August 2000, Haden was hit by a car while crossing a street in Venice, Calif., suffering severe damage to her head, legs, and pelvis. Haden -- now a solo artist who has also worked with Green Day, Spain, the Rentals, and Luscious Jackson -- did not have medical insurance and has been saddled with bills that have reportedly exceeded $100,000. A November 2000 concert featuring a cadre of fellow Los Angeles musicians, including Beck, Tenacious D's Jack Black, Matthew Sweet, and members of the Go-Go's, raised some $12,000 for her care.

Vegas Records chief Jon Halperin says "A Benefit for Petra Haden" will sell for between $7 and $10 and will be in stores by summer. The project's initial pressing will consist of 3,000 copies, although more may be re-pressed, depending on demand.