Stars are letting loose and giving effortless updos a whole new meaning this season. Undone, intentionally messy effects are replacing the classic half-up styles on the red carpet. The look is flirty and fresh yet still formal enough for a high-glamour fete. Check out celebrities' takes on the trend, then vote for your favorite below
Gwen gives her topknot extra edge by purposely leaving tendrils out of her bun. The spiky effect complements her fashion-forward wardrobe and power pout.