i just received the same call about a $25,000 giveaway, she wanted to enter me in also to get a diamond watch along with something else, second she said my address I hung up. I'm thinking they need to be reported to the proper authorities, I'm sure this is a scam, so they'll find out for me. The fact she lied about where she was located is more than reason enough for me to go forward with this.
ps- i recommend you follow suit and contact the north carolina police department next time you get a call like this, for at least they will start to regard the calls more seriously rather than just one person they'll have multiple to go off of. the number is 1-704-336-8398, i highly recommend next time you receive a call like this you call them.