K-Ci & JoJo, 'N Sync and Olivia Newton-John have joined the line-up for the PAX benefit concert scheduled for May 31 at Radio City Music Hall.

Proceeds from the show, which will also include performances by the previously announced Mariah Carey, Matchbox 20 and Paula Cole (see "Mariah To Join Paula, Matchbox 20 For Benefit"), will go to PAX, a non-profit organization dedicated to halting gun violence in the U.S.

PAX was founded two years ago by Talmage Cooley and Daniel Gross, whose brother, Matthew, played in the Bushpilots before being injured during the shooting at the Empire State Building observation deck in February 1997.

• K-Ci & JoJo
• *NSYNC
• Olivia Newton-John

If you happened to miss the groundbreaking Lilith Fair tour last summer, you can now sample it on a CD. Two, to be exact.

"Lilith Fair: A Celebration Of Women In Music" will be out on April 28 as a double live CD. On the album will be performances from Lisa Loeb, Paula Cole, Meredith Brooks, Shawn Colvin, The Indigo Girls, Tracy Bonham, Suzanne Vega, Victoria Williams, Emmylou Harris, and Fair founder, Sarah McLachlan, with more artists still to be announced.

Cole, Colvin, and The Indigo Girls will be back for Lilith '98, along with Missy Elliott, Erykah Badu, and Sinead O'Connor.

Lilith is casting its net wider this year. Our colleagues at MTV Radio interviewed Olivia Newton-John regarding the re-release of "Grease" on March 27. During the interview the Aussie singer said that she was approached to perform at this summer's Lilith (there is no word yet on whether Newton-John will actually play any dates). Lilith Fair starts June 19 in Portland, OR.

We'll keep you posted.

• Sarah McLachlan
• Lisa Loeb
• Paula Cole
• Meredith Brooks
• Shawn Colvin