if you went to a concert and at the end of it the singer/artist tells the crowd that you will be apart of a upcoming concert dvd

No, I would probably blend into the crowd and not worry about it too much. However if they were going to ask someone to come up on stage with them I would literally find someone bigger than me to hide behind. I Hate shit like that so much. It doesn't matter that the chance of me getting chosen would be very very small.

Taking your top off again? :P no it wouldn't bother me, it'd be cool.

Very nervous.
That's one reason why I don't go to concerts much anymore