Jun 14, 2015 at 10:30 am

Taylor Swift Sings 'Fight Song' With Rachel Platten in Philly (Video)

Taylor Swift poses alongside her pal Rachel Platten on stage for her 1989 Tour on Saturday evening (June 13) at Lincoln Financial Field in Philadelphia, Pa.

The 25-year-old entertainer brought out Rachel, 34, to sing a duet of her hit track “Fight Song.” Watch below!

“…and I’ve still got a lot of fight left in me. @rachelplatten #1989TourPhilly,” Tay captioned an Instagram photo of them.

Meanwhile, Mariska Hargitay joined Taylor on stage for the second night in a row as she sang “Style.”

“Everyone screamed so loud when @Mariska came out during Style, I’m considering just taking her on tour with me. #QueenMariska #Justice,” Taylor tweeted.