The Best of Friends — Jill Ross Klevin

It takes
gorgeous Susannah to turn Allison's life around. The
girls agree to swap â€" Allison will help Susannah improve
her grades, and Susannah will help Allison improve her
looks…and win Bobby, the boy of her dreams. Before she
knows it, Bobby asks Allison for a date, and soon they're
going steady. But her dream bubble bursts when Bobby
starts mentioning a friend named Judy, and breaking
dates. Miserable and confused, Allison decides to
break up with Bobby…and has the surprise of her
life!