Modeling or Acting?!?!?

I want to be famous! i can't decide whether i should do modeling or acting. I would love to be a model because i am always watching america's next top model and i would love to be an actress on disney channel. If i do decide to model or act my mom will support me either way, but if i decide to model i need to know some agencies!! If possible can you list agencies or stores i could model for? and can you guys give me your opinion whether i should act or model? Plz help me I can't decide!! I love both!!!