My game crashes everytime I try to play multiplayer games!

I was going to play on an open server, survival games etc. But I can't!

What actually happened was...:
As soon as I come into the server the game crashes. My Worlds work, realms works, this DOES NOT WORK AT ALL!
I played last night!?

Steps to Reproduce:
1. Log into minecraft
2. Open Multiplayer
3. Click wich server I wanna play on
4. I enter, it crashes.

I HAVE TRIED TO RE-DOWNLOAD IT! I HAVE RESTARTED MY COMPUTER TWICE AND CHECKED MY INTERNET. I PLAYED ALL NIGHT YESTERDAY, WHY DOESNT IT WORK NOW!?D':