Taylor Swift laughed it up with Kelly Osbourne and Chrissy Teigen in New York City on Tuesday evening, and after looking at these pictures of the ladies leaving Nobu, we're just dying to know what they were talking about!

Kelly posted a shot of the group and wrote, "Seriously had the best night ever..." and Taylor re-posted another one of Kelly's Instagrams and added, "These are 2 of the greatest girls and I'm still laughing from tonight."

Kelly and Taylor have been pals for a while -- last fall the girls had a baking party at Taylor's Los Angeles home and posted nearly half a dozen selfies from the low-key soiree. But we have no idea how the 24-year-old singer got linked up with John Legend's wifey! Maybe fellow model (and Taylor's BFF) Karlie Kloss introduced them?

Either way, we expect to see this group out and about again sometime in the near future...