0_Apprentice
Karaoke is awesome!  Have you ever tried it?
1_Wizard
I am too shy to sing but I like to watch it. It's been popular for a long itme, which I didn't know. Since the 60s at least
0_Apprentice
It was a brilliant idea coming up with it!  Do you know where it first started?
1_Wizard
Well, sing-alongs have always been popular, but I am not sure where Karaoke as we know it was developed. 
0_Apprentice
The Karaoke machine is pretty cool!  Who invented it?
1_Wizard
Not sure. But Karaoke has another usage, which is to refer to the instrumental version of a recording (i..e., no vocal track)
0_Apprentice
I've heard that there are Karaoke games available for some game consoles - do you know which ones?
1_Wizard
You sure ask some specific questions! Karaoke is different from lip synching, which is when a person mimes that they are singing a song