What can I do be less self conscience about how I look to others?

There's this Korn concert I really want to go to and I think they would just tear down the place with their music. The last concert I went to I just sat there because I was afraid of someone looking at me and commenting on my body or clothes...Korn is my favorite band and I just want to enjoy it because it'll probably be the only time I see them live but I just get self conscience around others.