ST LOUIS, MO - SEPTEMBER 29: Taylor Swift performs with special guest Nelly onstage during the 1989 World Tour at Scottrade Center on September 29, 2015 in St Louis, Missouri. (Photo by Dilip Vishwanat/LP5/Getty Images for TAS)
Credit: Dilip Vishwanat/Getty

Karlie Kloss received the best birthday present from Taylor Swift over the weekend—zero selfies required. The supermodel celebrated her 24th birthday in the Hamptons when Nelly and Swift surprised Kloss with a joint performance of the rapper's 2002 hit with Kelly Rowland, "Dilemma."

Dressed in a black crop top, a matching skirt, and casual white sneakers, Swift slipped seamlessly into character beside the "Country Grammar" rapper—hair flips and music video–inspired dance moves included. Thankfully for us, a few lucky partygoers were able to catch the amazing moment on video. Watch a few clips of the performance here:

It looks like Rowland has some competition!

Before hitting the stage, Swift began the weekend's festivities by celebrating her bestie's birthday with a selfie and a sweet message to her BFF.

"I LOVE YOU KARLIE! You're such an exquisite person, always trying to make things better for others," Swift captioned the fresh-faced photo of the two of them on Instagram. "Every day I'm inspired by how giving, loving, and thoughtful you are. Happy 24th Birthday!!!"