Jessica Simpson has taken aim at movie critics who call her films flops.

The pop star/actress insists box office sales show she's actually a good luck charm for movies.

She protests: "For people to say (movie) Employee of The Month was a flop is ludicrous.

"It made the money back - that's not a flop. For people to say The Dukes of Hazzard was a flop - it opened at $30 million.

"If these movies are flops, why would I still make them?"

Unfortunately for Simpson, her last film, Major Movie Star, really was a flop - in America.

After opening in just eight cinemas in Texas in December, the film was released on DVD. It has since become an unexpected hit in Russia.