What Real Girls Buy at Sephora

I stalked, er, stealthily followed around a group of beauty-obsessed girls at Sephora to find out what's worth splurging on

Dior SkinFlash Primer

Skin secrets

What she bought: Dior SkinFlash Primer, $42

Why she needed it:: “I normally use it and I just ran out. Sephora is where I get all my makeup.” — Sophie H.