Lily Collins

Photo: Getty Images/George Pimentel

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If you want bouncy curls and you have naturally straight hair...

The tool for you: Straight curling wand, 1-to-1 1/2-inch barrel.

Why: Whereas a tapered wand will make your hair look more "done," a straight barrel creates more natural-looking curls, Chastain says.

How to get the look: When using the wand, take the hair in sections and curl at a horizontal angle to make the curls more voluminous from the scalp down, Gibson says. Start by holding the wand in the middle of the strand and wind the hair up horizontally. This angle will help your hair look as curly at the top as it does at the bottom, Chastain says.