Tuesday's Child by Louise Bagshawe
The heroine of this novel is a tomboy. She loves her Doc Martens, heavy metal, and hanging out with her best friend, Ollie. She may have been born on a Tuesday, but graceful she isn't. However, Lucy's world is about to change. Ollie gets engaged, and her new boss wants her to smarten up. Lucy tries to turn herself into the kind of girl she thinks they want her to be - with hilarious and unexpected results.