GEEK GIRL 1 : FROM GEEK TO CHIC - Harper Collins UK

"She knows that a cat has 32 muscles in each ear, a "jiffy" lasts 1/100th of a second, and the average person laughs 15 times per day. What she isn't quite so sure about is why nobody at school seems to like her very much. So when she's spotted by a top model agent, Harriet grabs the chance to reinvent herself. Even if it means stealing her Best Friend's dream, incurring the wrath of her arch enemy Alexa, and repeatedly humiliating herself in front of the impossibly handsome supermodel Nick. Even if it means lying to the people she loves."