Hiphop Karaoke

In my limited experience of hiphop karaoke one thing I've found is that I don't actually know the words to any raps.  I think I do but what I actually know is the sounds, consequently if you try to read said lyrics it will say something ridiculous, like "Muggs is a funk fest" which just confuses you.  In the end it's a straight choice between making sort-of-right sounds at the sort-of-right time and trying to recreate what's actually been written; I'd suggest that the second option is the first step on the path to karaoke disaster.