Do you have to grease cupcake linings before pouring the cupcake batter?

No. Cupcakes are wraped in that fringy tissue paper. So when you put them in the oven, they bake on to the paper, then you add the icing, sprinkles, etc. Depending on the batter, you may have to, as i have had cupcakes that stick, but about 95% of the time you don't. There isn't really a way to tell if the batter is going to stick or not, so it is just trial and error really.