How Can An 13 Year Old Earn $850 Fast?

Okay, so I want to go to the Britney Spears & Nicki Minaj concert on July 31st. I NEED VIP to meet Nicki. Now, I need the money in the next two-three weeks before all the Platinum packages are sold. They VIP tix are $425, but I'm paying for two people. I have many things to sell, I have time to work, & I need the money. Thanks... ♥