Music The 12 Best Surprise Celebrity Guests on Taylor Swift's '1989' World Tour By Katie Krause 12:35 PM PST, December 17, 2015 This video is unavailable because we were unable to load a message from our sponsors. If you are using ad-blocking software, please disable it and reload the page. 15:56The 12 Best Surprise Guests on Taylor Swift's '1989' World Tour03:34'The Bachelor's Christina Mandrell Spotted in Taylor Swift's 'Fi…02:54Wynonna Judd Spills on Celebrating Her Late Mom Naomi With ‘The …02:15Anne Heche’s Best Friend Heather Duffy Reflects on the Late Actr…03:46‘Sister Wives’: Kody Shares His Hopes for Christine and Janelle …03:28'Sister Wives': Robyn 'Struggles' With Living Monogamously With …18:27'90 Day Fiancé’: Michael Reveals Affair With Another American Wo…02:02'Seeking Brother Husband' Showcases Women Seeking Multiple Male …02:07Inside the ‘NCIS’ Crossover Event With OG, 'Hawaiʻi’ and ‘Los An…01:26'MILF Manor': First Look at TLC's New Dating Series (Exclusive)04:38Golden Globes: Why Jamie Lee Curtis Called Out Paul Walter Hause…03:35Mischa Barton and Rachel Bilson Tear Up Watching Marissa's Death…02:02Jessica Betts ‘So Proud of’ and ‘Constantly in Awe’ of Wife Niec…03:00Brad Pitt Reveals Surprising Hobby He Shares With Daughter Shiloh05:09Steven Spielberg Shares Surprising Secret Behind Ke Huy Quan's C…02:30'Golden Globes': Janelle James on Sitting Near Brad Pitt and 'Ab…03:26'Sister Wives' Star Meri Brown Calls Out Media for Misinformatio…01:06'Abbott Elementary': Gregory's Dad Comes to Town (Exclusive)03:10Brad Pitt Was the Most Popular Actor at 2023 Golden Globe Awards Taylor Swift kicked off her 1989 World Tour on May 5, 2015, in Tokyo, Japan – and almost every night thereafter featured some type of magical surprise, a song that wasn’t on the set list – and/or a special celebrity guest. The stage itself became its own palatial spectacle and featured a catwalk where fans got used to seeing some of the world’s biggest stars join the 26-year-old singer. From Justin Timberlake to Nick Jonas and Mick Jagger, these are THE 12 best stars who hit the stage with Taylor – in order of when they appeared. 1. Taylor’s “Squad” Hailee Steinfeld, Lily Aldridge, Gigi Hadid and Lena Dunham (who all happen to be featured in the "Bad Blood" music video) joined Taylor on stage in East Rutherford, NJ on July 10. 2. The WeekndThe pair, who each scored seven Grammy nominations last week, sang a duet of “I Can’t Feel My Face” in East Rutherford, NJ on July 10. RELATED: All of Taylor Swift's 1989 World Tour Guests in L.A. -- Ranked by Randomness 3. Nick JonasNick showed up the night after The Weeknd to sing a duet of “Jealous” with Taylor. 4. Lorde The long-time pals sang “Royals” on July 14 in Washington, D.C. 5. Fifth HarmonyTaylor became an honorary member of the girl group on Aug. 14 in Santa Clara, CA. She donned a matching glitzy blue costume and sang “Worth It” alongside Ally, Camilla, Dinah, Lauren and Normani.VIDEO: Taylor Swift and Calvin Harris Celebrate Her Birthday Together -- At a Christmas Bash! 6. Kobe BryantThe Laker legend kicked off Taylor’s five-night stop at the Staples Center on Aug. 21 by presenting her with a special banner to celebrate her record-setting 16 sold-out shows at the arena. 7. Alanis MorissetteTalk about the ultimate break-up songwriter! The rocker queen joined Taylor in L.A. on Aug. 24 and they sang Morissette's “You Oughta Know." 8. Ellen DeGeneresThe daytime talk show host made concert-goers laugh with her sparkly tutu-ensemble as she danced down the catwalk. 9. Lisa KudrowTalk about HILARIOUS. The former Friends star sang “Smelly Cat” with the “Wildest Dreams” singer during her final night at Staples Center on Aug. 26. 10. Selena GomezTaylor’s BFF showed up on Aug. 26, too. “Swifties” and “Selenators” FREAKED OUT as the long-time besties sang Selena’s hit, “Good For You.”VIDEO: 12 Signs Selena Gomez and Justin Bieber Could Get Back Together in 2016 11. Justin Timberlake JT was Taylor’s final guest in L.A. – and what a treat! The twosome sang “Mirrors” – and the performance marked his first since becoming a dad in April. 12. Mick Jagger The Rolling Stones frontman joined Taylor in Nashville, TN on Sept. 26 for a performance of the rock band’s song, “(I Can't Get No) Satisfaction.” Taylor’s world tour came to a close last week -- on Dec. 12 in Melbourne, Australia (which was also the day before her 26th birthday). The tour raked in over $250,000,000 dollars and will surely go down in history as one of the most successful of all time. Who was your favorite surprise guest?! Vote in the comment section or on Twitter by sending @Katie_Krause a tweet with the #ETnow hashtag.And speaking of 2015 highlights, check out the video below for all the signs Selena Gomez and Justin Bieber could get back together! 12 Signs Justin Bieber and Selena Gomez Might Get Back Together This video is unavailable because we were unable to load a message from our sponsors. If you are using ad-blocking software, please disable it and reload the page.