One source claims the 18-year-old was actually bullied for being there -- apparently not everyone thought she earned the right to walk the shows!
The insider spilled:
In a new behind the scenes vid, Demi reveals her favorite part of reading the popular fashion mag AND who her fashion muses are (Kate Bosworth and Jennifer Lawrence BTW!), but the most revealing part of all was to find out WHY she used to read the mag as a kid.
OOOOOh, trust us, it's a shocker!
It just might hit the G-spot! LOLz! Watch Demi's revealing Cosmo BTS shoot (above)!!!