This look is so '60s sexpot-and it's easy! Use a volumizing shampoo and conditioner to amp up hair's natural volume so it doesn't look heavy.
Run a dab of leave-in conditioner through the end, towel-dry and blow-dry hair with your head mostly upside down.
Flip hair back over and make a deep side part. Smooth down flyaways with a little anti-frizz cream where needed.