Actress Cameron Diaz and singer Sean Combs aren’t dating rather they are working together on a film project, says her representative. Rumours of their budding romance started after they were spotted dining together a number of times in recent weeks. However, Diaz’s spokesperson has set the record straight. “They are longtime friends and have been seen together recently because they are developing a film project. They had lunch with a producer who is also involved in the project. They are not romantically involved,” a website quoted Diaz’s representative as saying. Diaz split from baseball star Alex Rodriguez in September, while Combs has been linked to singer Cassie.