Pop the popcorn kernels using an air popper. If you do not have one, place the kernels inside a paper lunch bag. Fold over the top of the bag and cook in the microwave until there are 2-3 seconds between pops. Transfer to a bowl.
In a small glass bowl, stir together the olive oil, smoked paprika, rosemary and salt. Microwave until just heated, about 20 seconds.
Drizzle the oil mixture over the popcorn, tossing with your hands. Enjoy!