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Lady Gaga, Amanda Seyfried

ELIOT PRESS/bauergriffinonline.com, Jamie McCarthy/WireImage

The temperatures may be dropping, but that isn't preventing Hollywood fashionistas from indulging in some high, neck-exposing updos this season. From Nicole Richie's boho-style bun to Amanda Seyfried's flawless Les Mis premiere style, we're seeing an array of chignons that are equal parts art and architecture.

(We cringe to think of how much hairspray must go into such a look. Then again, maybe it's a good time to invest in the bobby pin industry.)

Love that look? Well, it's not the only fad we're seeing on the rise this week. There's also a very intriguing candidate poised to replace the once-indomitable shawl.

But we're getting ahead of ourselves.