Gwen Stefani

Ruder describes new mother Stefani as a "gorgeous, amazing" woman "with very, very overarched eyebrows." Though Stefani should maintain her arches to distract from her heavy eyelids, Ruder says, Stefani needs to grow out her brows for a more natural, full appearance.

Vince Vaughn

His eyebrows seem to be disappearing. "He's a perfectly nice-looking guy, but if he does his eyebrows, he will look even more masculine," Ruder says. "He needs to dye his brows two shades darker than his hair."