In 1940, Lamour starred in "Road to Singapore", a spoof of Lamour's "sarong" films. It was originally meant to co-star Fred MacMurray and Jack Oakie, then George Burns and Gracie Allen, before Paramount decided to use Bob Hope and Bing Crosby; Lamour was billed after Crosby and above Hope. The two male stars began ad-libbing during filming. "I was trying to follow the script but just couldn't get my lines out", she said later. "Finally, I realised that I should just get the general idea of a scene rather than learn the words by heart, then go along with the boys." Said Hope, "Dottie is one of the bravest gals in pictures. She stands there before the camera and ad-libs with Crosby and me knowing that the way the script is written she'll come second or third best, but she fears nothing."