If there were ever any Sevenfold, Maiden or Linkin Park (besides In The End) anywhere around where I live I'd so do those as I imagine it'd be amusing listening me try to transition between screeching and singing, and failing to do so. Otherwise nothing; I would never karaoke a song I wouldn't actually listen to and most karaoke is pop music that, no matter how classic, I don't like enough. Being half deaf for the first half of my life doesn't help either (even with the words in front of me I still don't know the songs)

Basically I've never done a karaoke song although I'd be more than likely to duet something if asked.

On a side note, I remember being in a pub having a karaoke night once and this drunken smurfing cocktard thought it was really funny to keep doing "Nellie The Elephant", bellowing the chorus. It wasn't even funny the first time.