Celebrities ring in 2018: Julianne Hough shows PDA while Emily Ratajkowski goes bra-less in lace

New York City dropped to frigid temperatures on New Year's Eve, but you wouldn't know it from Emily Ratajkowski's outfit!

The knockout model-actress didn't mind the weather, forgoing a sweater in favor of a cleavage-baring black lace number. It's really not advisable to go sans bra when the wind chill is -10°, but hopefully she had a very, very warm coat.

Stars celebrating New Year's Eve 2018
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Stars celebrating New Year's Eve 2018
Happy New Year!!! #2018
Final glam of 2017! Thank you @ash_kholm and @justinemarjan for glamming me this NYE! We wanted something fabulous and festive. We are saying so long to the year in a glam way! Be safe tonight!! Cheers 🥂 loves!
Peace out 2017✌🏼✌🏼
ABOUT TO HIT THE STAGE!!!!!!!! - KU #NashvilleNYE
Oh... it’s ON my love!!! Let’s do this 2018!!! 💕💕💕🙏🏼
#happyNYE ❤️
mood ✨
Buh-Bye 2017💋
Happy New Year’s Eve! xx
We’re welcoming one more face to kiss in 2018! Wishing you #MásBesos in the New Year! #babybesos #HappyNewYear 😘

Host Allison Hagendorf celebrated New Year's Eve with the Official Bubbly of Times Square New Year's Eve, Barefoot Wine & Bubbly, on Sunday night.

(Courtesy of Barefoot Wine & Bubbly)

Happy New Year!! X We love u all!! X kisses from us all!! X @davidbeckham @brooklynbeckham @romeobeckham @cruzbeckham #Harper x ✨
And a happy new year 🌠🦋🔑🕊🌬
#SnowAngels in #Aspen. ❄️😇😇❄️
Happy New Year!
Happy New Year!!! ❤️🎇🎉🎉🎊 2018! Have a fun and safe New Year’s Eve.
@instasuelos New Years Rockin’ eve! Photo Cred: @davidmuirabc
Happy New Year! 🎉🎉🎉 #2018
Happy 2018 from the Cibs! Wishing you all the LovE in the world and so much peace in the new year. #happynewyear #happy2018 #herewego #bringiton2018 #LovErs #LovEbirds #desert #desertLovErs @eddiecibrian

Style props also go to Demi Lovato and Vanessa Hudgens, whose sparkly ensembles were perfect for the celebratory evening. But the best photo of the night wasn't fashion-centric at all: A dressed-down America Ferrera held up a baby onesie to announce that she and her husband are expecting their first baby!

Take a look at all the stars' NYE photos in the gallery above!


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