Tay Tay brought her bestie Selena Gomez, Justin Timberlake and even Friends star Lisa Kudrow to rock out with her on stage.
Selena sang her hit song "Good For You" with Taylor, and strutted her stuff T-Swift style down the walkway. She looked smokin' hot in a black booty shorts outfit that totally matched the white one Taylor was wearing.
"After nearly 8 years of friendship, I just can't wait to tell our kids we ACTUALLY got to perform in front of thousands of insanely beautiful people together. TWICE! I love you Tay. #bestnightEVER #whatISlife," Selena captioned a shot of them together on Instagram. The ladies previously performed Sel's song "Who Says" at Madison Square Garden in New York in 2011.
Selena wasn't the only T-Swiz surprise, either.
"Phoebe Buffay, everyone!" Lisa, dressed as her Friends character, walked onstage with an acoustic guitar. Can you guess what they performed? "Smelly Cat," duh! #HowFittingForTay
The third and final performance came from JT. He sang his hit "Mirrors" with Taylor.
"You have no idea. I don't even know where to start because anyone who knows me knows this is my favorite artist," she said about Justin before they sang.
As they walked off stage together, Tay told the singer, "That was amazing, are you kidding?" "Justin hasn't performed since he became a dad, and I'm just so honored that this was his first performance back," she told the audience he left the stage.
"I just am so happy that he would dedicate his night to coming out and playing for you guys. He's just the best! That's why he's my favorite."
Watch Taylor and her friends' epic performances, below.