Okay this is sooo simple. Its my go to, "I don't have time but want to look like I did" hair.

Hows that for an explaination?
Awesome.

Make a loop. You do this by not completely pulling your ponytail through. 

Leave out a chunk of hair at the base of your scalp [see right]. Figure 1

Take that piece of hair and wrap it around your exposed ponytail. 

Bobby pin your hair in place. Figure 2

Depending on how many layers you have you will need  between 2-5 bobby pins.



Picture
Figure 1
Picture
Figure 2