What are some good books for kids around 11 years old?

I am 1 years old and I am an advanced reader, so what are some good books for me to read that are like 7th grade books, I read stargirl which I really liked. I read alot of the books from Margret Peterson Haddix so what are some good books? I am into action, mystery, and kind of fun girly books! I am a girl!!!!! PLEASE HELP!!!!! Thank you guys SOOO much for putting your time into finding the books that I want!!!!! ♥♥♥♥♥