Can a landlord enforce a lease if they don't sign the lease? ASAP.. I NEED A ANSWER SOON> thanks?

So, I live in Arizona. Had to move out, break my lease because i cannot afford the rent. However, I do realize responsibility, and if needed I will pay for the remainder of the lease. However when the the lease was signed the owner lives out of state, and I sent a signed copy to her but never recieved one back. Just wondered if I had any loopholes? There are other issues, so if so, this will help my case. Thanks for all you help my yahooers.