Celebrity Twitter Pictures Week of January 25, 2012

Celebrities were all over this past week, and they shared all the fun on Twitter. Cameron Diaz and Jessica Chastain shared the front row at Paris's Couture Fashion Week, while Matt Damon ran into British reality star Lauren Pope. Mom-to-be Hilary Duff showed off her dark locks, as Rachel Zoe and Anne Hathaway got charitable over dinner. Click through to see all the pics, and don't forget to follow PopSugar on Twitter for exciting news and photos.