Keeping Up with Taylor Swift's Celeb On-Stage Cameos

We might not be actual members of Swift's squad, but at least we got to be included in her Washington, D.C. reunion with Lorde.

The crooner joined Swift on stage at the Staples Center in L.A. on Aug. 25 to belt out a duet of his hit All Of Me. Legend's wife Chrissy Teigen later shared a photo of her husband on stage with the 25-year-old singer and wrote, "All of me loves all of T!"

Keeping Up with Taylor Swift's Celeb On-Stage Cameos

Keeping Up with Taylor Swift's Celeb On-Stage Cameos

Think of the 1989 World Tour stage as a really, really big coffee shop, Phoebe! The Friends alum brought back Smelly Cat – a song she says she hasn't performed since the series ended – and the only thing missing from their L.A. duet was Swift's own cat squad.

"Hey, want to hang out tonight? I have this show thing – you should come!" – the imagined conversation between Swift and her best friend before hitting the stage together in Los Angeles to perform Gomez's Good for You.

Okay, Taylor, you win; we lose. We have no (we repeat: no) chill left after Swift brought out Timberlake to perform Mirrors at her fifth and final August tour stop in Los Angeles. "Anyone who knows me knows this is my favourite artist," she told the crowd before he took the stage. (Same.)

Only Taylor Swift could get Ellen DeGeneres in a sequined bodysuit and tutu! The talk show host joined Swift on stage during her Aug. 24 show at the Staples Center in L.A.

Are #DancePartyGoals a thing? Because we're pretty sure Swift and Ciara (who stopped by in Seattle with boyfriend Russell Wilson) are setting the bar incredibly high for the rest of us.

It pays to have 'Friends' in high places! The most unexpected guests during Swift's second Los Angeles show were Matt Leblanc, Chris Rock and Sean O'Pry -- whom you may recognise as the hunk from her Blank Space video!

Last-minute choreography rehearsals, extra soundchecks, finding an extra tour costume for Swift – sure, it was a lot of work, but we're sure the ladies of Fifth Harmony would say that every second was more than worth it for the experience of getting an invite to the 1989 stage.

It's not hard to see why Swift would consider these two her "heroes:" After all, Baez is one of the most iconic singer-songwriters of all time, and Roberts is one of America's reigning sweethearts. Remind you of anyone in particular?

Swift is the first artist to have 16 sold-out shows at the Staples Center -- home to the L.A. Lakers. So it was fitting that Lakers superstar Bryant joined Swift on stage to congratulate her on the history-making moment. The athlete also unveilled a banner honouring Swift's achievement.

There's no doubt that a Little Mix/Swift collaboration is pretty much pop perfection. What we're really wondering is just how unstoppable these ladies will become now that Swift is officially part of their girl-power coven.

Swift is celebrating "no more dramas" - with the help of legendary singer Mary J. Blige. The Grammy winners shared the stage in Los Angeles as they performed Blige's hits Doubts and Family Affair.

One Republic's Tedder was one of the first celeb guests to join Swift on stage during the Los Angeles leg of her tour. The pair belted out One Republic's 2013 hit Counting Stars to a sold-out crowd.

When you're watching Swift perform, it's hard to remember that she's just a regular human being like the rest of us, but the fact she's also had Derulo's 'Want to Want Me' stuck in her head (before inviting him onstage in D.C.) helps a little.

Another concert, another introduction to the newest member of Swift's squad. Pejic, who walked the runway with Lily Donaldson in Chicago, is further proof that the 1989 stage is the hottest runway in, well, the world.

On the surface, Hargitay's appearance at Swift's show in Philadelphia was awesome because it allowed Swift to have a mini-'Bad Blood' reunion onstage, but really, it was all about getting to witness the life-changing meeting between Olivia Benson the cat and her namesake.

We're just going to assume that Swift can predict the future, so consider Williams's appearance at her London concert an early celebration for the tennis superstar's Wimbledon victory.

We think Swift herself summed this one up best: "I feel all of the feelings now." Same.

No offense to The Trinity, Frostbyte and Slay-Z, but our favorite part of Swift's 'Bad Blood' re-enactment in New Jersey was watching Lucky Fiori (Dunham) get to ham it up for her moment in the spotlight.

Honestly, we're just comforted by the fact that Swift still regularly rocks out to 'Radioactive' as well.

Forget the catwalk filled with Swift's besties and 'Bad Blood' costars: We just finished binging 'Orange is the New Black', which made this East Rutherford, New Jersey, show all the more exciting.

Not only did Serayah – a.k.a. Dilemma a.k.a. 'Empire's' Tiana – get to walk the runway in Chicago, but she also got to live out our dream of singing one of Swift's songs with the singer herself – something we have been rehearsing every day in the mirror since, like, forever.

We'd probably say something about how awesome it was to see Taylor Swift get back to her country roots with their duet to 'Take Your Time' in Chicago, but we're a little too busy swooning over Hunt at the moment.

Sure, Swift described the experience of singing one of the biggest songs of the year, 'Shut Up and Dance', as a "60,000 person dance party," but isn't that how we'd sum up every single one of her 1989 tour stops?

She's got that red lip classic thing that we like, they've got a song called 'Classic' – really, it was only a matter of time before Swift and MKTO got together for a sing-along.

When Swift throws a summer party, she goes all out – like, say, calling up Nico & Vinz, whose song 'Am I Wrong' has been stuck in everyone's head since the weather started warming up, to help heat things up.

Well, we officially picked out our dream song when Swift inevitably invites us out for karaoke night: 'Trap Queen', which she jammed to with Fetty Wap himself at her Seattle tour stop.