Jessica Alba Palate

Love that smile!

Jessica Alba spent her Sunday sweating it out at the Pilates studio, and the 31-year-old actress is whipping her body back in shape for Sin City 2. Not like she needs to spend that much time at the gym, but if reprising her role as Nancy Callahan requires her to wear bras and chaps and dance on tables, a few extra workouts each week probably won't hurt!

Jess tweeted a photo of a smoothie yesterday and wrote, "Greens drink for lunch after @atkinjen kicked my butt this AM!" Seeing as she's also carrying an iced tea and a large bottle of water, it looks like Jess is giving the whole liquid diet thing a try ... at least for one meal a day!