Alanis Morissette is slated to give the U.S. Senate a jagged little piece of her mind as a witness during Tuesday's hearing on digital music issues, according to a source close to the proceedings.

Morissette — whose publicist couldn't confirm her appearance — is expected to join Don Henley and a host of music industry officials at the Judiciary Committee hearing, which will address issues of copyrights and royalties in the world of online entertainment (see "Henley, Petty, Love Urge Artists To Fight The Labels' Power"). '70s guitar hero Ted Nugent is tentatively scheduled to speak as well.

It's not yet known what Morissette plans to say at the hearing, but the singer/songwriter was an early supporter of online music, striking a deal with then-controversial Web site MP3.com in 1999.

Also slated to testify at Tuesday's hearing are Napster CEO Hank Barry and Recording Industry Association of America CEO Hilary Rosen, as well as representatives of Tower Records, AOL Time Warner and the National Music Publishers' Association.

In addition, Public Enemy frontman Chuck D will join another revolutionary, Napster founder Shawn Fanning, in Washington on Monday night for a public discussion of the future of file-sharing that will serve as a prelude to the hearing.

The Napster-sponsored forum will be held from 7 to 8:30 p.m. at the unlikely venue of the Ronald Reagan Building and International Trade Center.

Tuesday's hearing, "Online Entertainment and Copyright Law: Coming Soon to a Digital Device Near You," will be led by Senator Orrin Hatch, who has expressed sympathy for Napster in the past.

The beleaguered company, which faces an injunction that forces it to remove copyrighted material from its service, is offering users who attend the hearing free t-shirts and concert tickets (see Napster Recruiting Users To Attend Senate Hearing On Digital Music").

(For complete coverage of the Napster saga, check out MTV News' "Napster Files.")