Joan Baez, Julia Roberts are latest to join Taylor Swift on stage

Story highlights

  • Pop star Swift is often joined on stage by other celebs
  • She's currently on her "1989" tour

(CNN)You may not actually be a celebrity if Taylor Swift hasn't brought you on stage.

This time around, it was "legendary singer-songwriter Joan Baez and Academy Award winner Julia Roberts" who joined Swift during her performance of "Style" at her concert Saturday in Santa Clara, California. The stars danced around on stage a bit, and Swift tweeted pics calling the pair her "heroes."
Bringing out fellow celebs on stage during stops on her "1989" tour has become as a standard for Swift as the hordes of screaming teens.
In Detroit in May, the singer performed a duet of "Radioactive" with Dan Reynolds of Imagine Dragons and was reunited with her "Bad Blood" music video co-stars models Gigi Hadid and Martha Hunt.

When Dan Reynolds from Imagine Dragons comes and surprises the Detroit crowd with 'Radioactive'..... !!!!!!!!

A photo posted by Taylor Swift (@taylorswift) on

Home Slice, Catastrophe, and Slay-Z. @marhunt @gigihadid #1989TourDetroit

A photo posted by Taylor Swift (@taylorswift) on

In Washington, her BFF Lorde took center stage with her, since they are a pair of "Royals."
Her New York gig in July included the U.S. women's soccer team, singer Nick Jonas and "Orange is the New Black" star Uzo Adoba.

Last night the incredible @nickjonas sang 'Jealous' and 60,000 people sang it with us/screamed uncontrollably.

A photo posted by Taylor Swift (@taylorswift) on

Die-hard fans were thrilled when Mariska Hargitay showed up on stage at Swift's Philadelphia show in June. The singer has a cat named "Olivia Benson" after Hargitay's character on "Law & Order: SVU."

Catastrophe and Justice Right after @therealmariskahargitay brought the house down on Night 2 of #1989TourPhilly

A photo posted by Taylor Swift (@taylorswift) on