1) Bad mouthing other "chicks"
This, My friends is a classic element to any "normal" white girl sleepover... It's perfectly normal to badmouth other girls (or boys for that matter) behind their backs because in our spiteful day and age, they will probably be talking about you behind your back anyway so really, there's no real harm done in it...
2) Stuffing our faces with junk food and then immediately feeling bad about it
Junk food: the ultimate element that is essential to attempting (emphasis on attempting) to pull and all-nighter.
3) checking on our (my group of friend's) nonexistant social lives (DEATH TO TWITTER!!!)
Social networking has actually partially destroyed the social element of sleepovers, because instead of saying "hey did you hear that frank and bobina "did it" last night?" It's now: yeah he posted an "after fornication selfie"...
4) BOYS (or girls, whatever floats your sexual preferences boat?)
Do I really need to explain this one?