Over the weekend, Taylor Swift brought surprise guest Julia Roberts onto the stage during a "1989" concert in Santa Clara, California.
Taylor and Julia were also joined by legendary folk singer Joan Baez, 74, best known for her 1975 song "Diamonds & Rust."
After the concert, the “Bad Blood” singer gushed on Instagram, "Tonight Joan Baez and Julia Roberts danced it out to 'Style'. These two women are my heroes. What an honor."
Throughout Taylor's latest tour, she has brought celeb guests to the stage, including Uzo Aduba, Lena Dunham, Karlie Kloss, Gigi Hadid, Cara Delevingne and Nick Jonas.