Girls between the ages of 8 and 18 around the world were diagnosed with the same disease in 2010 when Justin Bieber's hit "Baby" was released. This disease would later be recognized as Bieber Fever. His adorable hair flip made him irresistible to many, but now Bieber is bringing sexy back with his new album "Purpose." With the release of 13 new songs, it is very apparent that the Bieber Fever epidemic has returned.

In 2013 the University of Minnesota found that the most common symptoms of Bieber Fever include fainting, screaming, irrational public outbursts, and crying. However, with the return of the Bieber craze, I decided to make my own list. Here are the signs and symptoms of Bieber Fever:

1. You've tried learning the dance from the "Sorry" music video (and you've dressed like the dancers, too).

2. You get defensive when someone won't play your Bieber song request at a party.

3. When someone asks, "Aren't you a little old to be listening to Justin Bieber?"

4. You get all googly-eyed when Justin posts a pictures on Instagram.

5. When you're alone and JBiebs comes on:

6. When you're with the squad and JBiebs comes on:

7. When you see Justin on the cover of a magazine:

8. When you hear the "Purpose" tour is coming to a town near you:

9. And then you have to use the puppy dog eyes on your parents to buy tickets.

10. But then you realize Meet and Greets are $2,000.

11. But it's all OK because you swear you're going to marry him someday.