SIMPLY RED: Jerry Hall tapped her feet as actress and singer Jeanne Marine performed at a Roger Vivier cocktail Monday night in Paris. The Texas-born model and actress will be taking to the stage in September in a London production of “Steel Magnolias.” “I am playing the Dolly Parton-like character,” she said. Marine’s partner Bob Geldof said his new album, titled “How to Compose Popular Songs That Will Sell,” is out next month. The musician and activist is also flying to Addis Ababa this weekend for a summit attended by French President Nicolas Sarkozy. Marine confessed her talent with the ukulele was relatively new. “I just picked it up one day and put a few melodies together,” she shrugged.