Video Related To: Kristen Stewart gives a rare smile as she arrives for Balenciaga show at Paris Fashion Week

From casual to couture — Kristen Stewart steps up her fashion game. Hey there, I'm Karli Bulnes and we've got Ms. Stewart in some daring pants in today's PopSugar Rush. Kristen Stewart cracked a sweet smile and gave a wave to fans lined up outside her hotel in Paris today before ducking into an awaiting car. The Twilight star was on her way to Balenciaga's Fashion Week presentation, and when she arrived outside, Ms. Stewart indulged a pack of photographers with a little bit of posing in her very fashion-forward pants. Take a look at them from the front and back — the tight, black, leather trousers overlap with her shoes so perfectly they almost look connected. As the new face of Balenciaga's new women's fragrance, Kristen represented by sitting front row with Salma Hayek and by wearing the design house's duds today . . . It was a very glammed-up look compared to her casual airport style, which was on display when she landed in France yesterday. And we just got a glimpse of another one of Kristen's looks in this new movie poster for On the Road, which does not have a US release date yet, but is rumored to be premiering at festivals this year.