SUMMER CAMP!? (One Direction / Ed Sheeran) *EDITING*

UNDERGOING SERIOUS EDITING! I wrote this when I was 14 so everything basically sucks, but since this story is so popular I won't take it down, I'll rather work may way through editing it slowly but surely :)
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It's finally summer and everyone is happy. Well maybe not everyone...

Jessica won some competition and her sister forces her to go on the summer camp.
Megan, as lively as she is, got the chance and took it. She wanted to go to summer camp to get new friends, so she's going.
Alison is the daughter of the camp leader so her mum says that she has to be there.
Maddison has nothing to do and said she was just going to sleep, but her parents had other plans and just dropped her off on summer camp.
Ever doesn't have lots of friends. Her foster mum says that it's good for her, so she can earn some friend, so she does as she's told.

These girls meet and lots of things happen. One thing that's different with this camp is that there are some celebrities there. Who are they?