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Both go short and red — Sienna with black tights, Alexa with sleeves and statement jewels.

Image Source: Getty
Read More Sienna MillerCelebrityRed CarpetAlexa ChungStyle Battle
pss pss 4 years
I can't choose, both are my favourites. But in this slideshow Alexa totally beats Sienna (20-5). You picked great Alexa's looks and not that good for Sienna. But in general, like I said really difficult choice.
nikkeeb nikkeeb 4 years
ooo...tough choice, but amazing slideshow! SO many fab looks from both girls!!
water-lily water-lily 4 years
Going in I thought Alexa who? But She narrowly beat out Sierra, due to her current accessories.
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