Taylor Swift: with a little help from my friends
It seems anyone who is anyone has appeared onstage on Taylor Swift's 1989 World Tour

Easily the most important pop star of today, Swift’s star power has reached even greater heights and stretched beyond music, thanks to her highly successful, star-studded 1989 World Tour.
In typical Swift fashion, she has invited fellow radio-friendly singers to join her onstage, including Nick Jonas, Jason Derulo, John Legend and close gal pals Selena Gomez and Lorde. Swift, 25, has also shared her stage with iconic folk singer Joan Baez and breakthrough acts like The Weeknd and Fetty Wap, who sang his hit Trap Queen, a contemporary love song about cooking cocaine – among other things – with a lover.
And then there were the tour’s unorthodox moments: Ellen DeGeneres appeared onstage, Lisa Kudrow sang the memorable Smelly Cat from TV show Friends at one show, and Kudrow’s former co-star, Matt LeBlanc, hit the stage at a show with Chris Rock. Julia Roberts even walked the stage like a runway as Swift performed her hit Style.
The pop star also invited athletes to join in the fun, from Kobe Bryant to Serena Williams to the US women’s soccer team, days after they won the World Cup.
