The night of June 10, 2016, is something you will never forget. A normal night after a show gone wrong.

Your sister, your best friend, was killed tragically doing what she loved. I would say sorry, but I know you've heard that word over and over and must be getting tired of it.

I cannot imagine ever losing my younger brother. He's one of the most important people in my life.

I applaud your act of heroism for attacking the shooter from the moment she got shot. By the looks of it, you didn't think twice. It was instant.

Not only did you save the hundreds of lives at the venue, but you made sure that the shooter didn't get away from the horrific crime he committed. It is said that he planned to return home two hours away like nothing happened.

It disgusts me that someone would even think about harming her. She seemed like an absolute sweetheart. She even greeted him open arms, not knowing his intentions.

I know you're going to have guilt for the rest of your life because you couldn't save her. Don't. You didn't know this was going to happen. No one did. You saved many other lives that night.

I hope that her tragic death makes a change of security in venues. There needs to be stricter security at concerts, especially general admission ones.

As someone who goes to general admission concerts a lot, I know that they don't really check what's in our bags or do a body check.

It may take longer, but I think it is worth it.

I know that Christina is looking down on you and is proud of your actions that night.

The next couple of months are going to be rough, I'm not going to lie, but take it day by day. It will be OK. She's your guardian angel, looking after you, your parents, friends and fans.

She's an inspiration to many. I don't know if this will give you peace or not, but she died doing what she loved, being with her fans.

God bless.