Side part + shoulder-grazing lob + smudged eyeliner = perfection.
To copy Alba's blown-out hairstyle without hitting up your local Drybar, use a 1-inch curling iron to curl your hair away from your face. Leave the ends of your hair out for a modern feel.
If Khaleesi (aka, the queen of long hair and braids on braids -- oh, and also dragons) can be this happy with a collarbone-grazing hairstyle, so can you.
Extremely Versatile Hairstyle alert: Johnson's fringed lob. After blow-drying your hair, use your fingers to work your bangs into place. (Celebrity hairstylist Mark Townsend told me that Johnson always styles her own bangs this way.)