It's fun to sing a karaoke on Youtube videos. Check these out for free karaoke channels:

 


The KARAOKE Channel
https://www.youtube.com/user/TheKARAOKEChannel


SING KING Karaoke
https://www.youtube.com/user/singkingkaraoke


Ultimate Karaoke Channel
https://www.youtube.com/playlist?list=PL3B549BB113761002


The Latest Karaoke Channel
https://www.youtube.com/channel/UCpl0GufK_uUELpF8G2l_r9A


KaraFun
https://www.youtube.com/user/karafun/videos


Vevo Karaoke Channel
https://www.youtube.com/channel/UCQHthJbbEt6osR39NsST13g


Elvis Karaoke Channel
https://www.youtube.com/channel/UClngfKvGdJN5wCalKGNBlFQ


Karaoke Music UK
https://www.youtube.com/channel/UCsq32uVdkmAFan8QPvOmhbw



* You might also search other karaoke videos on Youtube by keywords: "[song title] karaoke"