Celebrity Social Media Pictures | Week of Sept. 20, 2012

Celebrities were extra busy this week, but they took a few seconds to share new pictures with friends and fans. Mary-Kate and Ashley Olsen took part in NY Fashion Week, while Jessica Alba did some silly modeling of her own. Models Doutzen Kroes and Miranda Kerr both gave peeks at their behind-the-scenes fun too.

Click through now to see the rest of this week's cutest celebrity candids, and don't forget to follow PopSugar on Instagram, Facebook, and Twitter!