Depends what you want to look like. Fitness is very varied. Fatima Whitbread was incredibly fit with a physique that would make most men feel inadequate. There is a major trend to try going for a 6 pack which on women is usually accompanied by a lack of curves which can still look fit.
Sorry for the vague and likely silly answer but it is hard to say unless we know what your aim is. I have admired the fitness of women from marathon runners to power lifters, they have looked fit because they are. Not all have the classical 8 feminine curves but they all looked fit.