Billie Lourd believes Pamela Anderson is the “most hard working” actress in Hollywood. The 32-year-old actress has heaped praise on Pamela, 57, describing for former ‘Baywatch’ star as a “queen”. Billie told PEOPLE: “She is the most hard working, dedicated actress ever.” Billie stars alongside Pamela in the new drama film ‘The Last Showgirl’, and she relished the experience of working with the veteran actress. Billie said: “She put everything into this role and she cared so much about every scene, every line, and I just could not be more grateful to have gotten to work with her. She’s inspo. F…