Scarlett Johansson stocks up at the supermarket after 'moving into Sean Penn's $3.8m home'

By DAILY MAIL REPORTER Undercover shopper: Scarlett Johansson tried to go unnoticed in a dark hat when she nipped out to buy groceries near Sean Penn's Malibu home yesterday Hiding behind her trilby hat, Scarlett Johansson looked eager to go unnoticed when she popped out for some groceries yesterday.The Iron Man 2 star, who this week denied speculation she is pregnant, called into a supermarket