Cant Login Keeps Crashing

Put the summary of the bug you're having here
When Ever I Logged In It Will Crash After The Mojang Sign Leaves
What I expected to happen was...:
It To Load Up With The Minecraft Title Screen
Describe what you thought should happen here
It Would Load With The Minecraft Title Screen
What actually happened was...:
It Crashed
Describe what happened here
Changing My Texture Pack And It Crashes

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...