It's back. It's giving away free music. And it's your chance to add your music to the free for all. CBS has relaunched mp3.com.

Artists interested in getting on the site or featured can submit through Last.fm. Doing so will give you the opportunity to be featured on the site.

No one knows how well the site will do, but it probably wouldn't hurt to get a song or two up to promote yourself.

"MP3.com has been a cornerstone of the online music movement since the early days of the Internet," said David Goodman, the President of CBS Interactive's Music Group.