Taylor Swift Threw a Fancy Dress NYE Party The singer threw the fabulous New Year's Eve party to celebrate the arrival of 2019. Guests were directed to dress up as their "childhood heroes." The attendees included several of Taylor's famous pals. Blake Lively, Ryan Reynolds, and model Gigi Hadid were all in attendance. The "Shake it Off" singer dressed up as Ariel from 'The Little Mermaid.' Gigi Hadid attended the party dressed as Mary Poppins. Taylor posted a group photo of the partygoers all dressed up. She also wished all of her fans good luck for the new year. Taylor Swift, via Instagram