Possibly the most slick and modern cut of the bunch is the blunt bob. "This sleek hairstyle is great for women with oval, square, or heart-shaped faces. It's really great on fine hair as it adds volume," said Jason Collier, hairstylist and Sheamoisture ambassador. His top tip for keeping this cut looking super sleek and straight is to finish with something like the SheaMoisture 100% Virgin Coconut Oil Leave-In Treatment (£11) to protect the hair from any unwanted frizz.