Cinema Secrets in Burbank is going all-out for Halloween, with a high-profile sidewalk display announcing that the makeup store is fully loaded for the season. In addition their usual glamour makeup supplies, the main store features numerous Halloween accessories: special makeup (for wounds, etc), seasonal costumes, wigs, and "half-masks" - which cover or partially cover the face (a la The Phantom of the Opera), affecting a glamorous look suitable for a masquerade.
Additionally, there is a separate entrance for a section in the back called "The Crypt," which is loaded with more elaborate pull-over monster masks (i.e., the Predator), along with a plethora of Halloween decorations, props, and mechanical effects.
Cinema Secrets is open seven days a week, mornings and afternoons. Check their website for exact hours.