Sing this! I See Stars.

Come on girl, you’ve got one shot to be with me
You know you drive me crazy,
But I know how to take your breath away so lets go
Well I don’t care what’s going down here
You can see me, and I can see you
So lets skip this game, we both feel the same
And I’ll show you enough to use

All you do is run through my head
Are you getting tired yet?

Everyone’s jumping up and down,
I’m starring at the crowd,
And the dream girls singing the words
And she looks like she needs me
Dance with me and I’ll show you what you’re missing
And everybody in town, put your hands up all around
And sing this, sing this

For further info Audacity can remove a vocal line but not separate it or make it more more clear.
It can however slow a track’s speed.
http://audacity.sourceforge.net/
References :