From the Urban Dictionary:

'Queen Bee - A girl who, usually in a high school setting, is the "Leader of the Pack". She doesn't always have to be the prettiest, but she is extremely confident, and because she thinks she's hot, others do too. She knows all of the "important" gossip, and people emulate her style. If the Queen Bee wears something new and different, others will wear it the next day. She always has the hottest boyfriend, and is at all the parties. Everyone always talks behind her back about how much they hate her, even though everyone secretly wishes they were her friend.'

Someone has to rule the high school with an iron fist-it might as well be your character!