To turn PC into the centerpiece for your own karaoke parties, or even to practice on your own, all you need is a source for songs, a mike and a good pair of speakers. Karaoke videos differ from other tracks in that the lyrics are removed from the audio and displayed on the video. Most of the karaoke apps available for your PC come with a selection of songs already, but you can always get more from YouTube, iTunes or any of the many websites devoted to this widely popular pastime.