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1. A Good Mousse

"Mousse is worth spending money on!" Warren says. "Cheap mousse has a tacky texture."

2. Dry Shampoo

We should all use dry shampoo regularly because it’s less drying than washing your hair with water every day. But make sure you pick one that’s translucent, Warren advises. “You don’t want a white spray.”

3. The Right Hairspray

This will disappear as soon as you brush it—and won't stay stiff!