3 Ways to Style a Bob, According to a Celebrity Hairstylist

For a sexy, sleek look, whip out your flat iron. Be sure to spray your hair with plenty of heat protectant like the Chi 44 Iron Guard Thermal Protection Spray ($16) prior to styling.

"Once your hair is completely dry, use a flat iron to straighten small sections," Keshishian said. She recommends you go over each section two to three times to get it super smooth and use a shine spray like It's a 10 Miracle Shine Spray ($21).