Hello, Elle!
No, you sing on your own to the music of the song.
So, instead of Kris Kristofferson singing, it's me singing!
No, I am pretty grim to be fair, but it's only taking part in a fun evening!
It's a bit of a laugh and every participant gets a round of applause!
Now, Miss O, on the other hand is very good indeed.
She does not just sing but performs the songs, too.
A few years ago, I saw a young lad go up, and he told the the compere he would like to sing "Bohemian Rhapsody", and of course he was asked "are you serious, it is very difficult?"
The young lad replied that he would give it a go, anyway.
He was absolutely brilliant.
The best I have ever seen at karaoke.
Not unlike BGT, often loads of dross, and then you find a gem!