karteekkarteek001, its a bit difficult to 'remove' vocals from a song, but there are several utilities that allow you to do so...
try Music Morpher Gold (trial version works just fine) ----> www.musicmorpher.com
or, you can use Audacity as well, but you'll have to follow some steps to remove the vocals. If you wanna know how, I'll let you know!
http://audacity.sourceforge.net/download/
The end result wont have the vocals, but the quality of the track would not be the same. It will sound a bit 'wet', just like being played from UNDERWATER!

but it sure is fun... I've tried it...

Exactly. An ordinary PC user cannot do it very well, but the DJs can do it with the help of special hardware and other devices...
Djs do the reverse process. They extract the vocals and remove the music instead !
;)