When it comes to throwing incredible parties, Taylor Swift is renowned. And thanks to the help of some of her extra-special celeb friends, Swift saw in 2019 in the best way possible — dressed as Ariel from The Little Mermaid.

Blake Lively and her husband, Ryan Reynolds, were also in attendance, with the former Gossip Girl star dressing up as Dorothy from .

Model Gigi Hadid stole the show with her pitch perfect Mary Poppins costume. Bravo!

Good news for anyone who was worried: Taylor Swift is back on the NYE bash beat, and this year did not disappoint.

Tay went with a "dress as your childhood heroes" costume theme, which is pretty damn cute—the hostess was , Blake Lively channeled Dorothy from , and Gigi Hadid transformed herself into . Watch out, Emily Blunt.

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New Year's Eve also saw the release of Swift's Reputation concert film on Netflix, much to the delight of fans all over the world. Did I mention that ? You're welcome.

Amy Mackelden Weekend Editor Amy Mackelden is the Weekend Editor at HarpersBAZAAR.com, where she writes about entertainment, celebrity news, beauty, and fashion.

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