"I don't do anything," he told host Jimmy Fallon. "I promise. It looks bad."
The Canadian said his blackout windows were to blame for his encounters with cops.
"You see pictures of me getting pulled over, but really the tints are really dark. I need dark tints because I don't want to cause accidents because people want to take pictures.
"I just thought it would be more safe for everyone else if I had dark tints. I'm thinking about other people."
Bieber went on to say that he was having fun being young.
"I'm having fun being 18 and enjoying my life and
being responsible." Earlier this year, Bieber's Ferrari made headlines when a paparazzo was knocked down and killed while trying to photograph the star in his car.
Bieber was not in the car at the time of the accident, one of his friends was driving the vehicle.
The following day Justin released a statement calling for more law changes to deal with paparazzi. But things were a lot lighter on the set at Jimmy Fallon's late night show.
The singer and the presenter got up to all sorts of hilarious antics during his appearance – Bieber payed basketball with a bowl of ramen noodles, kissed a mannequin and claimed Chuck Norris was his father.
The singer also treated the audience to a glimpse of his washboard abs. Supermodel Naomi Campbell was also a guest on the show and was delighted to meet Bieber – she posted a photo of the two of them hanging out backstage on Twitter.