Can I bring my selfie stick

They are not allowed to take your phone away.

I don't think you can take selfie stick into the stadium. Usually, guests are not allowed to bring it. Check the information about the events, they explain everything what you can and cannot bring.

Kurt is right. You have to check it in. It's not allowed in the stadium. You can always pick it up after your show

Yes you can,but you will have to check it threw security like everything else.