At this point in the lifespan of Taylor Swift's career, it's possible that more celebrities have appeared on stage with her during a concert than have not appeared on stage with her.
We kid, of course, but only a little bit.
Especially during Swift's "1989" tour, everyone from models to movie stars to professional athletes have shocked audience members by making a cameo, typically during the song "Style."
Here's a look at those who, at least temporarily, were a part of Taylor's squad.
Taylor Swift teams with her best friend for this concert duet. Yup, it's Swift and Lorde on the same stage!!!
Taylor was joined by Roberts and Joan Baez during a show in San Francisco at Levi's Stadium.
Hey, it's Sam Hunt! Watch this video to see the country star join Taylor Swift on stage in Chicago.
Kobe went ahead and surprised Taylor by presenting her with a special banner in Los Angeles.
Ladies and gentlemen, it's Taylor Swift and Walk the Moon! Watch them perform "Shut Up and Dance" in concert here.
Taylor Swift and Uzo Aduba team up here for a rendition of "White Horse." Check out the unexpected duet now.
Little Mix also performed together during Swift's stop at Levi's Stadium on August 15, 2015 in Santa Clara, California.
Taylor Swift brought another special guest out on stage with her during a concert in New Jersey. This time, though, she sang a duet with him.
The members of Fifth Harmony stop and wave to the crowd in this still from a concert on August 14, 2015.
Fetty Wap joined the fun at CenturyLink Field on August 8, 2015 in Seattle, Washington.
Shawn Mendes smiles here for fans at CenturyLink Field on August 8, 2015 in Seattle, Washington.
Russell Wilson and Ciara
Russell Wilson and Ciara are dating. And they are waving here to that same Seattle crowd alongside the artist.
Nico and Vinz
Swift performed "Am I Wrong" with special guests Nico and Vinz when the tour stopped by BC Place Stadium August 1, 2015 in Vancouver, British Columbia, Can.
Malcolm Kelly and Tony Oller
Malcolm Kelly and Tony Oller of MKTO appeared at Gillette Stadium on July 25, 2015 in Foxboro, Massachusetts.
Andreja Pejic and Lily Donaldson
Models Andreja Pejic and Lily Donaldson came out during the show at Soldier Field on July 19, 2015 in Chicago.
Honey, Andy Grammer is good! Here is the singer alongside Swift in Chicago.
It's Jason Derulo! He performed onstage with Taylor at Nationals Park on July 14, 2015 in Washington, DC.
Hailee Steinfeld, Gigi Hadid, Lily Aldridge and Lena Dunham
True members of Swift's squad - Hailee Steinfeld, Gigi Hadid, Lily Aldridge and Lena Dunham - came out during The 1989 World Tour Live at MetLife Stadium on July 10, 2015 in East Rutherford, New Jersey.
World Cup Champions U.S. Women's Soccer National Team
Gotta wonder if winning the World Cup or appearing on stage with Swift was more of an honor for these athletic heroes?
So Many Stars!
Martha Hunt, Kendall Jenner, Serena Williams, Taylor Swift, Karlie Kloss, Gigi Hadid and Cara Delevingne ALL came out on stage during a June stop in London, England.,
Mariska Hargitay and Cara Delevingne
Mariska Hargitay and Cara Delevingne shocked fans when Swift rolled into Philadelphia on June 12, 2015.
Taylor Swift has teamed with another musical heavyweight. Ready to see her duet on "You Oughta Know" with Alanis Morissette?
Yes, Ellen DeGeneres came out for a show in Los Angeles in a tutu!
HA! Lisa Kudrow joins Taylor Swift on stage in Los Angeles for this duet of a Friends classic.
It's Justin Timberlake!!!! Watch the artist duet in Los Angeles with Justin Timberlake. Amazing!
Ready to go insane? Selena Gomez joins Taylor Swift on stage in Los Angeles for this duet of "Good For You."
Welcome to the stage, Avril Lavigne! The singer duets here in concert with Taylor Swift on the classic single "Complicated."
Taylor Swift teams up here with Wiz Khalifa. Watch the stars come together to sing a rendition of "See You Again."
It's a Taylor Swift and Steven Tyler duet! Listen and watch the superstars sing "I Don't Want to Miss a Thing" during a concert in Nashville.
Taylor Swift teams here with Mick Jagger for a incredible duet. Sit back and take it in now!
Taylor Swift has brought yet another big name with her on stage. Watch her sing a duet here with Charli XCX.
Taylor Swift got a bit raunchy in her latest concert duet. Watch her dance up a storm now with Tove Lo!
Talk about some major Girl Power! Watch Taylor Swift team up with Miranda Lambert for a duet of "Little Red Wagon."
Best duet ever? Taylor Swift doesn't just sing "Let It Go" alongside Idina Menzel in this video. She does so while dressed as Olaf!