sunglasses Beyonce singer nyc jay-z smile

Beyonce Knowles was spotted entering a NYC office building on Tuesday, and the pregnant singer smiled for photogs as she was escorted through the front door. Bey rocked a pair of electric blue patterned leggings, and even though she's about 6 months along, you'd never know it. After she confirmed that she was expecting her first child with husband Jay-Z back in late August, she hasn't exactly switched over to maternity wear!

And speaking of that baby bump, here's a behind-the-scenes video of Beyonce showing off her bulging belly while she shot her latest music video. "Right now I am actually shooting the video of "Countdown" and I am six months pregnant, pretending that my stomach is flat in body suits," she jokes. "But thank god you can't really tell from the front, but when I turn to the side ... oh baby, oh baby!"