The pre-film fitness regime is working! Slender Kristen Stewart flashes her toned stomach in cropped T-shirt

By SARAH FITZMAURICE Toned and taught: Kristen Stewart flashed a glimpse of her super-toned stomach as she made her way into the passport office in Van Nuys in California yesterday She was seen dashing out from a gym after a yoga class earlier this month and it seems that whatever Kristen Stewart is doing, it’s certainly working. The Twilight star flashed her toned and taut stomach yesterday as