What should i wear to a Justin Bieber concert?

I am going to a Justin Bieber concert next summer. I know its a long time away but i wanna start planning :). Im 15 but ill be 16 when i go its my bday present. I have light brown straight hair that goes past my shoulder. And side bangs. I have blue eye and im 5’3. The concert is in Las Vegas so most likely it will be very hot. I was thinking shorts or a cute dress but im not really sure! Oh and how should i do my hair and makeup? Should i go to a salon or spa before the concert? Or just do it myself? Thxs so much to all the helpful answers!

justin bieber concert