Beyoncé Knowles stepped out in a cutout black gown at the opening of Tory Burch's new flagship store on Madison Avenue in NYC last night. The jersey and leather Michael Kors dress was worn by Leighton Meester earlier this year at The Roommate premiere, though Beyoncé had her growing baby bump hiding underneath. Beyoncé was joined by Brad Goreski, Serena Williams, Russell Simmons, and others at the celebration. It was a busy day for the pregnant star, who also attended a few Fashion Week shows. She sat front row with her sister, Solange, at J.Crew in the morning and later changed into a short dress to catch the Rodarte and Vera Wang presentations. Beyoncé's been on the go all week after being spotted in the stands with Jay-Z at the US Open finals on Monday.