Unknown Software

[R0b2009]

I am running Vista Ultimate. Ran across some software some months ago, thought it was built into vista, but can not find it. It was the visualization that got me. An artist's name would be in a circle and would link to their songs. If you click on that song, it would create another link to an artist with the same song name.
Does anybody know what software this might be?

[DaveC2003]

Is it software that is similar to Windows Media Player?

There are a lot of MP3 software for users to choose from on the net.