Pretty Little Liars is a curious mix of drama and suspense, I think. At a first glance, it strongly resembles Gossip Girls, even though I've never seen that either. It's got a high school setting, a clique of friends, jock boyfriends abound, etc... but then pops in a murder investigation. The professional investigation stuff with the police and detectives is actually a bit laughable, but it can be over looked for the other more intriguing plots.