Taylor Swift Surprises Fans with Selena Gomez, Justin Timberlake & Lisa Kudrow for Epic LA Show

The "Style" singer brought down the house on Wednesday night during her last show at the Staples Center for her "1989 World Tour" -- and pulled out all the stops with some incredible celebrity guests.

The 25-year-old surprised the audience when she brought bestie Selena Gomez on stage to perform her song "Good For You." Swift introduced her "Bad Blood" costar as a "multitalented performer who is good at pretty much everything she does," before launching into the hit.

Taylor wowed in a white crop top, matching high-waisted shorts and thigh-high boots, while the 23-year-old complimented her pal in a black and gold romper and a similar pair of heels.

But that wasn't the only surprise Calvin Harris' girlfriend had in store for fans. Later in the show, she brought up Lisa Kudrow -- introducing her as her "Friends" character Phoebe Buffay -- for a rendition "Smelly Cat."

Taylor saved her most shocking surprise for last, sending the entire audience into a frenzy for her final guest.

Taylor, who had changed into a blue number, brought out Justin Timberlake to perform his hit song "Mirrors." The 34-year-old donned a pair of jeans, a black blazer, white shirt and a hat for his first performance since welcoming his son Silas. Jessica Biel even accompanied her other half and cheered him on from the audience.

The actress wasn't the only celeb attendee at the concert. Julianne Hough, Nina Dobrev and Jaime King also jammed out at Taylor's show, where Hough showed off her engagement ring for the first time.