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Taylor Swift adds Julia Roberts to the squad

Taylor Swift has been one busy lady.

As her headline-making 1989 tour rolls on, Swift hit all of us right in the feels with a touching on-stage tribute to her godson -- Jaime King's baby boy.

"I was holding this little baby the other night and I was just thinking differently," Swift told her audience, referencing time spent with King's son. "When you're holding onto something that's so innocent and so perfect and has no idea what's coming for it with the world. The world is going to throw so many things at you as we grow up."

Meeting my boy. @jaime_king @kyle_newman

A photo posted by Taylor Swift (@taylorswift) on

Swift then launched into her song "Never Grow Up," off her 2010 album "Speak Now."

"She was so open and candid and really made us all feel like we were her friends," said Swiftie Kay Marie Goddard, who captured the moment on video. "It was really cool knowing that it was really special for Taylor and we got to share that with her."

Just a few weeks ago, Swift referenced the song's lyrics in an Instagram post about her godson.

"Your little hand's wrapped around my finger and it's so quiet in the world tonight..."

A photo posted by Taylor Swift (@taylorswift) on

"We were so surprised!" said Goddard. "Taylor had already brought out Little Mix earlier and sang 'Never Grow Up' so no one was really expecting any special guests during Style! Julia and Joan looked like they were having so much fun on stage."

Tonight Joan Baez and Julia Roberts danced it out to 'Style'. These two women are my heroes. What an honor.

A photo posted by Taylor Swift (@taylorswift) on

Swift has treated concertgoers to a laundry list of special guests over the course of her latest tour. Among them: rising girl group Fifth Harmony, who gushed to ET about the experience at Sunday's Teen Choice Awards.

"It was a dream come true," Camila Cabello told ET of the performance, in which Swift joined the girls for a rendition of their hit, "Worth It." "She learned the choreography, wore our tour outfit -- it was seriously a night we'll never forget."

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