You need a karaoke of the song that you are going to use for recording . For that you need to get the Background music of your song .How to get the background of a song without vocals you can see our previous post .
Using the Audacity now open the karaoke music file.The Sound track gets loaded into the track in the form of wave.

Many have the interest to sing and record it through and share it ! Here i like to get you know how to record your voice and add the karaoke to your voice and feel it to be like a real one .
I used a basic software " Audacity " which you can download free from net. Now let us start the audacity.
I have already said about how to remove voice from the songs ,you can also see How to remove the vocals for a song.
Here also i will say about how to remove the voice by using our Audacity! But i prefer Music morpher ,which removes voice at greater extent than audacity .