The latest additions to Taylor Swift's squad is folk singer Joan Baez and American sweetheart Julia Roberts. The "Shake It Off" singer asked the women to join her onstage during her show Saturday night in Santa Clara, Calif., according to the Huffington Post.

Both Roberts and Baez showed their support for Swift by donning 1989 tour T-shirts. Swift shared a picture from the concert on Twitter, writing: "Tonight Joan Baez and Julia Roberts danced it out to 'Style'. These two women are my heroes. What an honor."

  

Their surprise appearance took place a day after Swift performed with pop group Fifth Harmony. During her current 1989 tour, the singer has brought onstage a slew of celebrity friends, including Fetty Wap, Nick Jonas, Cara Delevingne and even the U.S. women's national soccer team.