Bollywood actress and L'Oreal ambassador Aishwarya Rai Bachnan always looks perfect! Her skin looks completely flawless, even on the red-carpet, where she'd be opting for much higher coverage to compensate for unforgiving flash photography.
To recreate Aishwarya's 'no foundation' look, always match your base to the skin on your neck, not your jawline as many believe (... and certainly not your wrist!).
The aim of foundation is to even out skin tone, and most people's faces are darker than their neck due to sun exposure. By matching your shade to the skin tone on your neck, you're more likely to get a seamless look than an obvious 'foundation face' one!