Pretty little liars

An ABC Family series. The show is based around 4 bestfriends who started getting creepy texts signed 'A' a year after their 'leader' Alison goes missing. Alison was the most popular, and prettiest girl at Rosewood High, but she was actually a bitch who made fun of everybody. She believed in that secrets brought people closer, and therefor knew all of Aria's, Spencer's, Emily's, and Hanna's secrets. And after mysteriously disappearing a year ago, the 4 besties get texts from an all-knowing A who knows their dark secrets, blackmails them, and seems to know exactly what their next move will be. They cannot go to the police about A, because A knows things that they don't want the police to know. This show is the perfect dose of romance, humor, mystery, and suspense. It's pretty addictive.