Taylor Performed With Fifth Harmony & It Ruled

Taylor Swift has been absolutely slaying it on her 1989 World Tour for the past few months, and every show has offered an extra treat in the form of a special guest who joined her on stage, either to perform a song or just to say hello to the cheering crowd. Fifth Harmony got the honors in Santa Clara, Calif., on Friday night, when they joined Swift for a performance of the girl group's hit single, "Worth It." Needless to say, it was pretty amazing, especially since both artists already have plenty of crossover fans, and it's a great track. To be honest, it was probably my favorite special appearance from Swift's current tour, and that's not an easy feat, by any means.

“Any artist that you see on the 1989 World Tour stage is here because they wanted to be out of the goodness of their own heart,” Swift told the audience before introducing Fifth Harmony, according to MTV News. “They wanted to be here and perform you for you and to surprise you. This means they came here for free, this means they could have been doing anything else on Friday night, but they wanted to be with you and they chose Santa Clara, California to be the place they surprised.” Ugh, is it terrible to say I'm totally jealous? Because I definitely am.

Fifth Harmony aren't the first special guests to grace Swift's stage. Here's a round-up of some of the best of the rest of the famous faces that have appeared so far — and we still have ages to go before it's over, meaning the potential is endless for some more big names to show up.

The Weeknd

While performing in New Jersey last month, Swift invited The Weeknd to sing "I Can't Feel My Face," much to the crowd's delight. It's an amazing song, and while many of her fans may not have been familiar with his music before the show, they certainly were after his performance!

Lena Dunham, Hailee Steinfeld, Lily Aldridge, Gigi Hadid

Nothing like a "Bad Blood" reunion on stage to make the crowd go wild. Not only do these women happen to be the stars of one of Swift's biggest and best videos, they're also her good friends in real life, too, so it just makes sense to invite them along.

U.S. Women's Soccer Team

The U.S. Women's Soccer Team's victory at the Women's World Cup was an incredible feat, so of course Swift had to invite them to join her in New Jersey, so that her thousands of fans could also join in their celebration. Amazing!

Nick Jonas

I love "Jealous" to an unhealthy degree, so the fact that Swift brought Nick out on stage to perform the track during her show in East Rutherford, N.J., was basically the best news ever. So, so good!

Uzo Adubo

Everyone loves Orange is the New Black, and we all know Crazy Eyes is probably the best/most interesting character on the show. Where better for actress Uzo Aduba to turn up than on stage with Taylor Swift? It just makes sense!

Fetty Wap

You wouldn't necessarily put Swift and the "Trap Queen" artist together, but once you do, the result is amazing. Fetty Wap joined the 1989 Tour's Seattle date earlier this month, and I basically wish I was at that show.

Jason Derulo

I'm kind of obsessed with Jason Derulo's new album, so the fact that he turned up in Washington, D.C. to sing "Want To Want Me" with Taylor is basically the best news ever. The only sad part is that I wasn't there to see it.

Lorde

It just made sense for Lorde to join Swift on stage, considering they're pretty close friends and also amazing musicians. A duet of "Royals"? Sign me up!

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