I want to know the sites wherei can download the karoke of hindi songs(Bollywood) for free of cost.Help me... ♫

Well, you will find no postings for illegal sites here, but fortunately there are some free and legal downloading sites out there that may suite your needs. MP3.com has a small selection of bollywood music for download, so also does Last.fm. Some others to try may be BollyWoodMusic.com and saavn. Good luck and do some google.com searching to find more.