I did Crazy Little Thing Called Love at New Years. It wasn't karaoke, we (my family) played it live. Most unfortunately, I can sort of sing, I can play excellent guitar - but I am SHITHOUSE at doing both at the same time.
So I just threw in joke lyrics and made sure the solo was good :D
The only Queen 'karaoke' I've ever done was Bohemian Rhapsody, of course. Taped it too, so I'll have that one haunting me everytime we watch the odd home video...
"Your not funny, your not a good musician, theres a difference between being funny and being an idiot, you obviously being the latter" - Dave R Fuller