What should we wear または say or...?

My BFFFFFFFF and I are going to a backstage VIP Justin Bieber concert. what should we wear. Here are some pics of us so u know what would fit me and her!!!! Plz help, whoever has the best answer that must be at least 3 sent. min i will add, give tons of props, and tell my フレンズ bout u. oh and the longest will get a better prize. maybe i'll get u a ticket, cause i have an extra one but i was about to return it cause my other BFF got sick and can't go i'll Eメール it to u . PLZ HELP. its in ATL! thnx