Taylor Swift wrapped up a five-night run in Los Angeles on Wednesday by making it clear why she deserves to have a banner hanging in Staples Center.
The superstar brought out three very famous friends to help her sing three very memorable duets, beginning with BFF Selena Gomez on "Good For You."
The crowd went totally bonkers for Taylor's close pal, who Swift described on stage as a "multitalented performer who is good at pretty much everything does."
But she was just getting started.
Up next, Swift made fans cheer and laugh hysterically by inviting Lisa Kudrow and her guitar to join her... for a rendition of "Smelly Cat!"
Kudrow essentially acted as her beloved character from Friends, Phoebe, for this version of her Central Perk-based classic.
“So @taylorswift13 is THE best person I've ever met,” the actress Tweeted after the show. “That was fun. Thanks Taylor."
And then Swift saved her best surprise for last.
How did Taylor top Ellen DeGeneres in a sparkly tutu? By telling the crowd she herself was in shock that her "favorite artist" was in the house.
Seriously, people, it's Justin Timberlake!!!!!
As you can see above, fans in attendance (which included stars Jaime King, Nina Dobrev, Julianne Hough and Zelda Williams) went utterly insane when JT showed up for a duet of "Mirrors."
He's been added to this impressive list of special Taylor Swift guest stars: