Tay and her friends "decided to dress up as our childhood heroes" to celebrate the new year, she wrote on Instagram.
If you're like us, you've been scouring the internet trying to figure out everyone who was there, and what they dressed up as.
Here's what we've gathered:
Ryan Reynolds dressed as...himself? His dad? Help us out here, buddy.
Taylor's BFF, Abigail, dressed as Posh Spice.
*Thanks Gigi for tagging these guys!