Healthy looking skin would be the correct term, I guess.

Makeup foundation plays a similar function as the melanin the skin produces. When sun exposed the amount of melanin is high and hides the small imperfections in the skin. I'm from the caribbean so during the winter, when the sun is less visible, my melanin levels drop. Parts of my skin look ashen and spotty since they have less pigment then other area.

Come summertime I seriously look 10 years younger.

Some people go too far and seriously distress their skin, producing wrinkles, premature aging, and increased chances of cancer.

Exactly what Yardie said.