Prepare the room for painting. Remove or cover any furniture with a dropcloth. Cover the flooring with plastic or dropcloth to protect it from any paint drips.
Prepare the popcorn ceiling for painting, removing any dust or debris from the surface. Brush over the popcorn surface with a soft brush to get between any crevices.
Apply a primer coat to the popcorn ceiling that is latex- or oil-based and not water based. Water-based primer can destroy the texture. Pour the primer into a paint tray and roll it over the surface of the popcorn ceiling. Once the ceiling is fully coated, allow it to dry overnight,.
Open a can of oil or latex ceiling paint in the color of choice. Add glitter in the color of choice to the paint, mixing it with a paint stick. Continue to add glitter until it reaches your desired level of sparkle.
Pour the glitter paint into a paint tray. Apply to the ceiling with a paint roller, going back and forth until evenly coated. The sparkle from the glitter will show up in the paint.