Hey, when it’s your movie premiere — here, it’s for “The Aviator” in which Stefani played Jean Harlow — you get to make a bold statement with your look. Stefani’s done just that with this drapey Vivienne Westwood gown and semi-crazy hair. The ‘do works with the vintage-style dress, says Bloch, because it adds a modern edginess that fits with who she is — plus the lion’s mane hair kinda fits with the leopard-print heels, it’s like a theme, get it?

“It says, ‘I’m a rock star.'” But for the rest of us, styling it into a chic updo would be a saner move, says celeb hair pro Ryan Cotton, who has styled Taylor Momsen and Leighton Meister.