Last Singer/Celebrity post, I promise

Revised 2/11/12
Howard Carter (played by Richard Long) helps Susie Ward (Mamie Van Doren) adjust the windshield of her Singer Roadster at a made-for-the-movies gas station in the 1953 film The All American. From emonds.com forums. Photo may be by Frank Worth, whose collection is handled by Capital Art.
The early fifties was the time period that the Singer distributor in America, Bill Vaughan, sought to boost publicity by posing celebrities with the cars. In this instance he even got a product placement in the only movie in which Mamie Van Doren and Richard Long (below) ever appeared together.
Publicity photo of Mamie Van Doren and Richard Long, from the 1953 film The All American. From Stirred, Straight Up, with a Twist blog.
The only other American made movie that I can think of that had a Singer Roadster in it - however briefly - was the original 1955 The Fast and the Furious, which featured a short scene with a privately owned Singer 4AD 1500, shown here being sandwiched in by a 1952 Kaiser Manhattan in front, and a 1952-3 Nash Healey in the rear:
From Internet Movie Cars Database.