Juliet Dove, Queen of Love: A Magic Shop Book

Juliet Dove is a girl who doesn't like to be noticed. But though she may be shy, she has a wickedly sharp wit. Whenever someone does take notice of her, she tears into the person with a savagery that's earned her the nickname Killer.
Juliet ends up leaving Mr. Elives' magic shop with Helen of Troy's amulet--that is, a virtual man magnet. Juliet doesn't know what she's got, but the boys in her class do--they start to notice her. Soon every boy in town is swoony for her. Yet, much as she'd like to lose all the unwanted attention, she can't: The amulet won't come off!
A sidesplittingly funny, heartbreaking whirlwind of a book about the high cost of loving, from the award-winning author of My Teacher Is an Alien and The Unicorn Chronicles.