how can i get into a meet and greet with the jonas brothers???

i am going to the JB concert on July 17th and it would mean the world to me if i got the chance to meet them!! i have heard that there is a contest to win them but it seems impossible. Also, how much does it cost? Do i need to buy an item that they sell (like a t-shirt or cd etc.) to get in? please help me!!! it would mean so much to me.
Thanks for all your help :]

i think you and the 3840594054 billion other rabid fans on Y!A should build a human pyramid in order to achieve your objective.

it won't help to buy shirts or items. Everyone does that.
You've got to face that there is very very little chance of meet and greet. So my answer is, I don't think you can. Unless your mom is friends with their mom.