The WaPo reports:

The music industry is launching a star-studded advertising campaign, using artists such as Britney Spears and Stevie Wonder to tout its most recent anti-piracy effort.

Full-page ads are scheduled to appear in newspapers today and will be followed by television and radio spots, urging consumers to stop downloading songs from illegal file-sharing sites on the Internet. The multimillion-dollar campaign coincides with hearings today before the House Judiciary Committee's subcommittee on courts, the Internet and intellectual property.

At issue in the House is a bill introduced in July by Rep. Howard L. Berman (D-Calif.). If it passes, it would protect copyright holders — such as artists and record labels — from liability for any damage they may cause while using software to disrupt file-sharing services and search public files on consumers' computers for illegal reproductions of copyrighted music....

UPDATE
Eminem's approach to piracy is less circumspect:

EMINEM is threatening to "beat the shit" out of fans who have illegally uploaded his music onto the Internet.
Despite his new album, 'The Eminem Show', being one of the most closely guarded pre-release projects in history, it is now widely available to buy and download illegally weeks ahead of release.

Despite strict security measures, all 20 tracks from 'The Eminem Show' are available on the Internet, almost a month ahead of the album's June 3 release - meaning his label Interscope could lose millions.

The rapper said bluntly: "I think that shit is fucking bullshit. Whoever put my shit on the Internet, I want to meet that motherf***er and beat the shit out of him, because I picture this scrawny little dickhead going 'I got Eminem's new CD! I got Eminem's new CD! I'm going to put it on the Internet.' I think that anybody who tries to make excuses for that shit is a fucking bitch."