I love teen trash, the sort of thing you can pick up and read without having to think too intelligently. Reading about people who aren't that different from you and the lives they lead. Sweet Valley High is definitely teen trash but it's high quality trash. It wouldn't have survived over 20 years if it was complete rubbish.
In Double Love, the reader is introduced to the lives of Jessica and Elizabeth Wakefield. Be prepared to hunt out the hundreds of books that follow in the series because this series is like a soap opera - you can't just read one.
A great short read that I'd recommend to any fan of teen trash - read how it's really done!