Known for her ‘peek-a-book’ hairstyle – it became a bit of a problem during World War II: “In the early 1940s, US government officials asked Lake to wear her hair up for the duration of WWII: it seems that too many women working in factories were imitating her famous “peek-a-boo bang” and getting their hair caught in assembly-line machinery.” (Turner Classic Movies)

Here’s a video making the point: