Luxe (The) by Anna Godberson

This book was a trashy, guilty pleasure. (Amazon compared it to "Gossip Girls", which I have not read.) It is suggestive in places, but not more than PG13 rated. The descriptions of ballrooms, gowns and hairstyles were delicious. The ins and outs of all the love triangles were entrancing and kept me reading. I liked how the characters had good points and bad points- nicely 3D! I was pretty sure what the climax of the story would be by halfway through, but there were enough twists and turns that I kept on reading. 

There are three sequels. I am starting the next one ASAP!