Did my best with search, hope it's not a repost
A Blonde woman was driving around very fast in her new shiny red sportscar. She gets pulled over by a female police officer, who also happened to be blonde.
"May I see your drivers license?" asks the police.
The blonde woman starts going through her handbag, getting more and more stressed by not finding her license.
"What does it look like again??" asks the blonde woman.
The police replies: "It's a small square, and it has your picture on it."
At last the blonde takes out a square-shaped mirror from her handbag and looks at, then turning it over to the police. The female police takes the mirror and looks at it, and then gives it back. She says:"It's ok, you can go, I didn't know that you were a police aswell."