What is last.fm? I like Wikipedia’s description the best:

Last.fm is … a music recommendation system … that builds a detailed profile of each user’s musical taste, also recommending artists similar to their favorites, showing their favourite artists and songs on a customizable profile webpage, comprising the songs played on its stations selected via a collaborative filter, or optionally, recorded by a Last.fm plugin installed into its users’ music playing application.

Basically, if you listen to music on your computer or iPod, you can report every song played to last.fm, which keeps track of all your listening habits and produces charts. Beyond that, it allows people with similar tastes to become “friends” and form groups.

Hence, the Judy Henske fan group.

Registered last.fm users can join by going to the Judy Henske Fan group and clicking “join.”