Just had this ad served to me.
I once sang that song at karaoke and just stood there for the second half of it because the vocals stop
I once saw someone do an absolutely terrific deadpan rendition of Tequila at karaoke at a bar. He got a standing ovation at the end.
This also reminds me of a tweet or tumblr post I saw a long time ago about someone doing the Simpsons theme at karaoke where they just say “the Simpsons…” and the whole song just plays.