1)Somebody tears up a picture of their favorite idol(not on purpose)
2)The hair stylist cuts their hair wrongly
3)Their favorite football team lost.
4)They see a documentary about flies and how dirty they are.
5)Their favorites for American Idol lost.
6)Someone accidentally said something bad about them and they get so touchy and sensitive
7)Some people doesn't want to share sweets with them.
8)Someone teased their idol.
9)Someone said they didn't like her favorite shirt.
10)Someone hit them a bit too hard accidentally
11)The person they like doesn't like her back or likes another person.
11) OR they can be emo JUST because they want to be emo.
Yes... girls are very weird sometimes.. but hey, we cant' live without them rite boys???