Taylor Swift brings more celebrities during her 1989 concert tour. This time Little Mix, Julia Roberts and Joan Baez rocked with the singer during a Santa Clara performance held Saturday.

Swift has six new gal pals for her concert squad, who rocked the stage in front of Swiftie fans at the Levi's Stadium in Santa Clara, California. According to Entertainment Weekly, the “Bad Blood” singer invited the members of the girl band Little Mix, and joined them in a performance of their hit song “Black Magic.” Swift even took to Twitter after the show and described the experience as “Amazing.”

The pop singer also wrote, “LITTLE MIX!! Love these girls!! They smashed it tonight in front of 50,000 screaming fans.”

The four-girl band also took to Instagram to thank the fans and Swift for “one of the best experiences in our little mix life ever!” The group’s Instagram note continued, “Cannot thank @taylorswift enough for having us tonight, 60,000 incredible screaming swifties with a sprinkle of Black Magic, thank you for being so welcoming to us! We love you Taylor can't wait to catch up very soon! xx Little Mix xx.”

The “Shake It Off” songstress further surprised her Santa Clara fans when she called on one of Hollywood’s greatest actresses Julia Roberts, along with folk rock singer Joan Baez on stage, E!News reported. The multi-awarded pop singer walked and danced along the stage runway, with Robert and Baez rocking alongside her. 

Swift also posted a picture of herself on stage with Roberts and Baez on Twitter and captioned the pic, “Tonight Joan Baez and Julia Roberts danced it out to 'Style'. These two women are my heroes. What an honor.”

The six ladies are the newest addition to Swift’s 1989 concert squad. During Swift’s Friday concert performance in Santa Clara, the singer also invited and performed with the girl group “Fifth Harmony” up on stage.