I want girl abs?

i am 13 years old. I am skinny but i want abs. so far i do 300 situps for like a week. nothing is happening. i want abs by june. Now its febuary. I want abs like nelly furtado in Promiscuous.really stands out. i am 5'4. 103 pounds. The sooner the better. i eat like every other day. and only drink water . if im hungry i drink water . what else can i do to get abs. and i dont want to smoke, drink or get plastic surgery. and remember i go to school.