Why didn't Elvis work more often with strong female musical co-stars like Ann-Margret? Given how powerful the result was in VIVA LAS VEGAS, it's a shame they didn't try to tailor more full-blown Hollywood movie musicals for him. He worked with Nancy Sinatra in SPEEDWAY, but aside from one song written for her by Lee Hazlewood, she wasn't given much to do musically in the film and doesn't even share a duet with Elvis. What would an Elvis teamup with Julie Andrews have been like? Or Shirley MacLaine? Or, dare I say it, Doris Day? And why not younger 1960s musical stars like Petula Clark or Diana Ross? Or even Annette Funicello. The possibilities are tantalizing. Instead they kept putting him with attractive but non-musical co-stars in lightweight romantic comedies with occasional songs, with titles like GIRL HAPPY, DOUBLE TROUBLE, CLAMBAKE, TICKLE ME, and EASY COME, EASY GO, that just don't compare with VIVA LAS VEGAS. At least in ROUSTABOUT, he had a formidable female co-star in Barbara Stanwyck. She didn't sing or dance, but she sure acted up a storm. And her chemistry with Elvis was far more evident than any he might have had with the starlets who populated all his fluffy, throwaway comedies with music.