I just finished the last book in the Pretty Little Liars series... and HOLY CRAP! LOL. A surprising series, sort of disturbing at times, and not what I expected, but I really enjoyed it. I think the ending was crafted really, really well.
Next I have The Gatecrasher by Madeleine Wickham to read. I'm hoping it's as good as the stuff she wrote under the Sophie Kinsella pen name but I've heard they aren't...