You can find PLENTY of makeup tutorials on how to get the perfect natural look on YouTube and makeup forums. Ayu has the perfect team of makeup artists behind her so her makeup will end up being flawless. It looks natural but there are probably layers of concealer and foundation on her face lol.
If you want a natural look, make sure you have your perfect foundation formula and concealer for your skin tone and type.
Wash your face, moisturize, prime your face for foundation (Smashbox Photofinish, Bare Escentuals Prime Time etc) and apply your foundation. That's what I do and it covers up my imperfections completely. You can use concealer if you're worried about certain imperfections on your face. Apply some natural blush, line your eyes and apply a few coats of mascara and you should be good to go. You can apply some natural eyeshadow colors if you want to bring attention to your eyes.
I hope I helped some.
