Britney Spears, the sexy singer that NASCAR marketers have been trying to use as a promotional tool for the sport, may be back in the stock-car scene, according to NASCAR sources that report that Brian France is pushing to have Spears listed as a part owner of a Cup team, possibly with wealthy Indy-car team owner Carl Haas. According to one man familiar with the situation, car owner Cal Wells could be the beneficiary. Wells said yesterday that NASCAR executives have been working with him on some options but said that Haas and Spears weren’t part of that project. NASCAR, in 2002, had hopes that Spears would play a role in a racing movie. Now plans for that movie may be dusted off and revived.