Zanuck relented to Grable's own request not to tamper with her successful screen formula. As a result, the studio prepared a film called "Pin Up Girl" for her. The film has her as a hostess for a USO canteen, who also provides entertainment for the troops during their time there. The lavish musical used the pin-up photograph in many scenes, which boosted the photo's sales. Many of the film's later scenes had to be rewritten to hide Grable's pregnancy. "Pin Up Girl" co-starred comedians Martha Raye and Joe E. Brown and was released in April 1944 to overwhelming success at the box-office. Critics, though, were not as accepting of the film. "Variety" wrote that the film "makes no pretenses of ultra-realism", but also called it "very pleasing and pleasant". After time off to give birth to a daughter, Grable returned to Fox to star in "Billy Rose's Diamond Horseshoe" (1945), co-starring Dick Haymes and Phil Silvers. Though the film earned more than $3 million at the box office, it struggled to make a profit because of its high production costs. "The Dolly Sisters" (1945), her next film, teamed her with newcomer June Haver, an actress Fox was promoting as Grable's successor. Although the press hinted that a tense behind-the-scenes rivalry existed between the two actresses, they both denied it, claiming to be good friends. "The Dolly Sisters" earned more than $4 million at the box office, and was Fox's second-highest earning movie of the year, behind "Leave Her to Heaven".