I have seen Lupe twice live and both times he stunk more than two piles of shit. The first occasion he had "technical issues", which I can appreciate, so he mopped around the stage and was lacklustre. The second time was a month ago and once again he has "issues with his sampler", and proceeded to throw a hissy fit on stage. It was at a festival and no one else had any issues the whole day.
The show must go on? Take a spoonful of cement and harden the fuck up. A born showman will put on a show no matter what.