How do i convince my parents into letting me go to a Lil Wayne concert?

If you will be accompanied by an adult then why don't you request that adult to ask permission to your parents to allow you to join with them in the concert. Your parents allowed you before in an overnight in a hotel because you're within the vicinity of your city but Oakland is quite far and they don't know what will happen to you. They just love you that much that's why if you really want to go to that concert, bring your two friends and that adult to your house and the four of you (including you) will ask permission to your parents. Explain things very well to your parents. Good luck!