With stardom come challenges that make celebrities face the reality of Tinsel Town. Five actresses profiled on “Hollywood Divas” experience the dark side of fame, like being blackballed by the industry over a personal relationship or confronting image issues over what others say about them. Golden Brooks thinks reality stars usurp actresses’ roles; Countess Vaughn believes her physique limits her roles; Paula Jai Parker feels shunned for marrying a production aide; Lisa Wu strives for respect as an actress; Elise Neal, nearing 50, reignites her dance troupe.