Karaoke Forums

I have few karaoke mp3 tracks. I have connected a mic to my PC(default). Now I want to mix karaoke track and my voice ( Song). How can I achieve this. What is the best tool freely available online? Note I am not looking only voice recorder, instead looking voice and mp3 mixer. (No special hardware preferred)

I just wonder the should be simple application of mixing 2 voices and why it is so difficult to get it online !

Try Audacity....
http://audacity.sourceforge.net/