Blake Lively Reunites with 'Sisterhood of the Traveling Pants' Co-Star Amber Tamblyn for Halloween!

Blake Lively and Amber Tamblyn are celebrating Halloween together! The longtime friends and former Sisterhood of the Traveling Pants co-stars had a mini reunion in honor of Halloween. Click inside to watch the video! On Sunday (October 31), Amber took to Instagram to share a video, where Blake made a surprise and silly cameo. “Look