Tia and Tamera Mowry are so identical (because they are identical twins), that is nearly impossible to tell them apart. Imagine being Jackee Harry trying to do that on the set of Sister, Sister. That is tough, really tough. How did she tell them apart?
Today, when she was on The Real, she revealed her secret to Tamera and the rest of the women. It was all about the attitude. As long as the girls acted a certain way, she knew which one was which. You can fake a lot of things, but personalities are hard to change. Unless they are actors. Oh wait….