Is it illegal to use a song from a big artist, and use the instrumental version to make your own music? Can you add it on Myspace Music?

Along with success comes haters! So why is there so much people hating on the Dirty’s music? Like New York! Now I’m not dissing NY, just the fans that hate on the south, they call our music "trash" so why is that? I know we have a few bad artist, but the best has yet to come!
Where do you live? The Dirty South, West (California), MidWest (Illinois), East (New York), or North (Maine)?

I have tried using audio software like Goldwave and others but it is either bewilderingly complex, and hard to figure out for a non-audio-techie, or the voice-frequencies do not get totally eliminated.
for the person who talked about copyright infringement assuming redistristribution for commercial/profitable purposes - the simple reason is to have fun singing Karaoke at home with the original instrumental as accompaniment, no commercial redistribution intended. There is no question of copyright infringement in such case as it would be only for personal use. (like converting music from purchased tapes/CDs into digital format so as to listen to them on MP3 players or Ipod).

I just had my first salsa lesson. The guy teaches so that we dance on the 2nd beat. I’m having trouble finding that beat. When the teacher counts it, I’m fine, but if left on my own, I might start on another beat. How do I find the 1st beat so I can step on the second?

1. I think its because they are miserable and they decide to come over here and be ass-holes for no reason. Whats your opinions?

2. I think it sucks now because like i hear all the time: People dont rap about reality no more.