Be Excellent To Each Other

My sister just got a cheap copy of Singstar for the PS3, without a mic. What mics will it work with, and can someone recomened somewhere to get a good/cheap one?

Any of the Singstar mics will work with it, I think. They just plug in via USB.

The PS2 and PS3 Singstar mics are the same (unless they finally shipped some wired ones). However, I don't think any other ones work. If you have a Rock Band or other USB mic around, it might work, but only as player one.