Jared Leto
Credit: Venturelli / Getty Images

DiMauro laughs when asked which male celebrity wears long hair best of all. "Easy, he says, "Jared Leto. Yes, he's a striking individual, but he also does the look differently than anyone else. He's got that rock 'n' roll thing and he can pull of that Jesus look. It's impressive." Leto, who plays in a band 30 Seconds to Mars, made headlines last year when he won the Academy Award for Best Supporting Actor in Dallas Buyers Club. In recent months he's been wearing his hair dyed ombre – or fading lightly towards the bottom – but DiMauro says natural is the way to go for men considering the look. "It's adventurous enough as it is."