In the past, the pop singer has gained a rep for her legendary July 4th parties and she didn't disappoint with her NYE party last night either.

Swift and her friends dressed up as their childhood heroes to ring in the new year.

She picked Ariel, the Little Mermaid, as her costume. Actress and friend Blake Lively dressed as Dorothy from 'The Wizard of Oz'. Gigi Hadid was Mary Poppins and Ryan Reynolds also attended (without a costume - boo!).

Other real-life figures and characters that appeared include Audrey Hepburn, Ms. Frizzle, Cinderella, Gwen, Mr. Toad, Avril Lavigne, Nancy Drew, Posh Spice, Rizzo, Frida Kahlo, and Steve Irwin.

You can flick through the pictures below:

We don't know who dressed best but Gigi Hadid's get-up was super impressive.

Taylor Swift's concert movie 'Reputation' hit Netflix just yesterday.

She is rumoured to be releasing new music in 2019.