Here's a list of what you need:
I use one of the laptops we have for patron check-out. The laptop has an HD outlet.

I connect it to our projector which is in the meeting room where we do 90% of our programs.

I also purchased a portable, Bluetooth speaker which came with a microphone.
https://www.amazon.com/dp/B00IWZZPW8/ref=sr_ph?ie=UTF8&qid=1466690256&sr=1&keywords=speaker
You don't need to buy Karaoke CDs either! Just search "karaoke [song title] and 75% of the time I've found a karaoke-friendly version of just about every song. Also, there's a youtube channel called Sing King Karaoke which can be found here.
Hope this helped. If you have any tips or ideas please comment.
***BONUS*** Here's a clip of one of my teens singing! She's very talented and it took a bit of coaxing to get her comfortable!







