I am looking for a series I had when I was a young girl and I need help! I am looking for a series around this time of Babysitters Club and Sweet Valley High, with a similar kind of subject matter. I cannot remember the title or any of the characters, I just know there were 4 main girls, and one of them had a twin brother and lived in a HUGE house, and another one of them would always end her conversations with 'ciao!' and usually wore a leather jacket. Any help on what this series was called?