AceShowbiz -

Taylor Swift continued her tradition of bringing surprise guests for her tour stop. During a concert at Levi's Stadium in Santa Clara, California on Friday night, August 14, she invited Fifth Harmony to join her on stage and together they made a live duet.

Taylor went so far as to don matching blue outfit with Camila Cabello, Dinah Hansen, Lauren Jauregui, Normani Hamilton, and Ally Brooke. She collaborated with the girl group on their single "Worth It" and performed the choreography.

I CANT EVEN SEE PAST MY TEARS TO TWEET- Camila @taylorswift THAT WAS SO AMAZING

A video posted by Fifth Harmony (@fifthharmony) on Aug 14, 2015 at 10:26pm PDT

Sound check with @fifthharmony right after they taught me their choreo and before they lent me one of their outfits so we could all be twinzies.

A photo posted by Taylor Swift (@taylorswift) on Aug 15, 2015 at 2:38am PDT

"Sound check with @fifthharmony right after they taught me their choreo and before they lent me one of their outfits so we could all be twinzies," Taylor posted a picture from the rehearsal before the show.

On-stage cuddling with @allybrookeofficial and @camila_cabello

A photo posted by Taylor Swift (@taylorswift) on Aug 15, 2015 at 2:43am PDT

So stoked this pic exists because this was SO MUCH FUN @FifthHarmony

A photo posted by Taylor Swift (@taylorswift) on Aug 15, 2015 at 2:41am PDT

Meanwhile, Fifth Harmony has just released "I'm In Love With a Monster", a song recorded for "Hotel Transylvania 2" soundtrack. Adam Sandler, Andy Samberg, and Selena Gomez will return for the second movie due September 25.