So if you are the center of attention in a show, sports game, public speaking, concert or whatever it is you still have to finish what you are doing. You still have to perform at your best because that is the best thing to do. It doesn't matter if people laughs at you. It doesn't matter if you are being booed, all that matters is you still enjoy what you are doing.
If you listen to them while you are performing then you will suck even more, you will become more uncomfortable and you will not be able to show what you've got. You will not be able to show what you really are to other people. Some people may dislike you but one thing for sure some people are also interested in what you are doing.
If you are performing and you feel like people are not liking what you are doing just keep going and do your best even more. It's not your business to become concern for what they feel and what they think. It is your duty to please yourself and not others.
Have you seen professional performers that was booed on stage? One thing that I noticed with them is they do not rattle, they just do what they need to do regardless of what people say. Some were even bottled but they keep their composure and they finish their performance.
Because if you don't finish your performance people will hate you even more, and you will look like a loser that has no classy attitude.
Just keep in mind that you do what you are doing not to please people, you do what you do to express yourself and it's just a bonus if people like it. If they don't, it's not a big deal.