Who Was the Last Woman To Have a Number 1

The question at the top needs to be adjusted.  Who was the last female solo artist NOT named Carrie, Miranda or Taylor to have a number one?  Excluding bands such as Little Big Town and Sugarland and other groups with females in them?

The answer might shock you.  Billy dukes is below with some of the numbers over the last 10 years.  He breaks it down for you simply and let's you know that a female solo artist hasn't had a #1 hit since 2004... but who was it?

Check it out here