Another blonde joke

An attractive blonde woman gets pulled over for speeding.
The police officer who pulled her over was also was also an attractive blonde herself. As the officer approached the car, she asked the woman for her drivers license. The woman looked through her purse and was getting increasingly frustrated. She finally asked the officer what it looked like.
the officer responded, 'it is a small square card with your picture on it.
Oh! the blonde exclaimed, here it is. She pulled out a small square mirror, looked at it then handed it to the officer.
The officer looked at it and says "I'm sorry Miss, you can go now, I didn't realize you were a police officer.