The Sunday Morning Hair Trick That's Kendall Jenner's Secret Weapon

Whether you've relied on dry shampoo for one too many days or just can't see the chic in fuzzy flyaways today, consider a generous dose of hair oil the natural enemy of a classic bad hair day--especially when your Sunday calls for a split-second style so you can get to the business of holiday shopping. Case in point: Kendall Jenner, who was spotted leaving Barneys in Beverly Hills with her dark layers smoothed back into a gleaming knot that telegraphed the same cool minimalism as her black outfi...