-Befriend them so you can tell one of your less popular friends about all the mean and dumb things they say.
-Get some weight gain bars from your mom and give them to the girls, under the pretence they will aid weight loss.
-Empty a bottle of moisturiser and fill it with foot cream; give to the girls and tell them it will help with their dry skin.
-Pretend to be bad at maths so you can ask one of their boyfriends to tutor you. Then kiss said boyfriend.
-Tell boyfriend mentioned above that his girlfriend is cheating on him.
-Turn the girls against each other by finding out their secrets, and if possible, send a candy cane to yourself and pretend it's from the Queen Bee so the other girls get jealous.
-Get into a fight with the Queen Bee, ensure she walks backwards into the road whilst you're arguing, causing her to get hit by a bus.
If you carry out everything I've listed above, there's a 99.99999% chance you will be Prom Queen.
Good luck!