LOS ANGELES, CA  [Tuesday Nov.30.2004]  /WMQT.com/ -- It's Tuesday -- time for new music! Several artists on the Net Music Countdown have albums in stores today, November 30.

First we have Jay-Z and Linkin Park mashing it up on "Collision Course." The CD-EP contains six studio recordings of songs performed by Jay-Z and Linkin Park, including the mash-ups "Dirt Off Your Shoulder/Lying From You" and "Numb/Encore." Linkin Park's MC Mike Shinoda produced the album, and fans can buy the CD with or without a bonus DVD. The DVD contains behind-the-scenes footage and the MTV broadcast version of The Roxy show, filmed for the pilot episode of the live performance series, "MTV Ultimate Mash-ups."

Kelly Clarkson releases her sophomore album, "Breakaway," today and is making several television appearances to promote it. Tonight, November 30, Clarkson guests on NBC's "The Tonight Show with Jay Leno" and tomorrow, December 1, Clarkson performs live on MTV's TRL. She'll also appear on ABC's Good Morning America this Thursday, December 2.

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