I feel like I'd absolutely love karaoke if I could get past the massive social anxiety that comes with it. I love rocking alone in the shower or car, but put me around other people and I'd freak out.
You just have to break past it, once you realise no one really cares if you sing badly, they just want more people to take part as well. Hearing someone else sing and then singing a different song to what others sing is always a joy when the regulars seem to just sing the same 2 or 3 songs over and over again. You'll always get cheered too at a proper karaoke night. Feels good, even if you do know that they cheer regardless haha.