Kristen Stewart had a smile on her face as she reported to work on the Berlin set of her new film, Sils Maria, today. She has been getting to know the city over the past few weeks, and she spent a bit of downtime running errands around the capital city yesterday. Kristen sported flip-up sunglasses for a break from filming in Berlin over the weekend as well. While her main focus is on her new movie, she did make headlines for another recent endeavor. Kristen went topless to star in a new ad campaign for Balenciaga's fragrance Florabotanica, which was released last week. This is Kristen's second go-around with the high-end brand since she was named the face of the scent in 2012.