By now, Taylor Swift fans are well aware of the fact that she regularly brings surprise guests on stage during her tours. So far, The 1989 World Tour has been no exception. Taylor continues to outdo herself with special guests, proving once and for all that she and her friends are the definition of #SquadGoals. Cue the jealousy, because we've ranked the best celeb appearances on Taylor's tour so far.
1. Mariska Hargitay
The namesake of Taylor's cat (Olivia Benson) joined Taylor and Cara Delevingne on the June 12 and 13 tour dates in Philadelphia, much to everyone's excitement. #Fangirling.
2. Serena Williams
The number one women's tennis player in the world took time off from preparing for Wimbledon in order to attend Taylor's show in London. Serena was joined by her best friend Caroline Wozniacki. Taylor's friends Kendall Jenner, Cara Delevingne, Karlie Kloss, Gigi Hadid and Martha Hunt were there as well. Is there anyone Taylor isn't besties with?
3. Emma Watson
While Emma didn't come up on stage, she did attend Taylor's London show! Someone snapped a picture of Emma and Taylor backstage, igniting our hopes of a budding friendship between two of our favorite powerful women.
4. Dan Reynolds (from Imagine Dragons)
In Detroit, Taylor rocked out to a "Radioactive" duet with Dan Reynolds from Imagine Dragons. Oh how we wish we'd been there to witness it.
5. Ed Sheeran
Taylor's bestie Ed Sheeran is always supportive of her musical pursuits, but he is on tour right now as well. Luckily, the two managed to team up in Las Vegas to sing Ed's song "Tenerife Sea" together on stage.
6. Little Big Town
Taylor got back to her country roots when she performed "Pontoon" with Little Big Town in Pittsburgh. Just look how happy they all are!
Adding to her impressive list of duets, Taylor sang along to "Cool Kids" with Echosmith on June 12 in Philly. We wish that we could be like the cool kids (aka, them).
8. Rachel Platten
In a night that sparked more than one amazing Instagram video, Taylor belted the breakout summer hit "Fight Song" alongside artist Rachel Platten.
We can't wait to see who Taylor brings out next! In the meantime, we'll continue to stalk her Instagram and sing along to 1989.