Why the hell are you asking here? It is most likely fake, but how the hell would anyone here know? Go to twitter and login with your current info. When you are able to login, then you have confirmed it is fake. You obviously could have done that in the time it took to start this spam thread.
It may not be FAKE !!! have u tried to login with your twitter password after the mail ? if u can... its ok. if u cant... there was a forgot password attack on your account.
Try to long into twitter and see if it works and then have them email you a new one. Don't do it through the email just in case.
It could be fake, but I recently got the same type of email because my password was actually compromised. There was a list online with my email password in it, and a few different sites like Zappos and Twitter sent me messages about it. There was a big breach of LinkedIn passwords recently, and also Yahoo Voice passwords.
Had an issue with my twitter account. Twitter team change password only when you send an appeal. They don't do that on their own. Be carefull with that