What on earth do i wear to an Ellie Goulding concert tonight??

[MummyTo2MonkeysAnd1Bug]

Taking younger sister to see her as an early birthday gift, quite like her music myself too but have been hearing mixed reviews about the venue O2 Academy Birmingham.... would like to look like i belong - not like the uncool older sister who is chaperoning the trendy teen!! Please help!!!!

If anyone can suggest and link then i have time to go shopping this afternoon and budget is £50 :)

Help!? Pretty please with a cherry on top?

I went to see her on saturday night in Bristol. There was a complete mix of people there and some were dressed up and others not. I just wore fat face knitted dress and leggings with long boots. Ellie was fab!

Brilliant :) so wont look out of place in this then - www.asos.com/Oasis/Oasis-Leopard-Print-Tea-Dress/Prod/pgeproduct.aspx?iid=1304933

with leggings and flat over knee boots?

www.asos.com/Oasis/Oasis-Leopard-Print-Tea-Dress/Prod/pgeproduct.aspx?iid=1304933this

this!!

Grrr!! I dont know what is wrong with me today!!