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Taylor Swift, The Band Perry,

Michael Hickey/LP5/Getty Images for TAS

Taylor Swift returned to her country roots at her concert in Indianapolis on Wednesday.

The Band Perry joined the 25-year-old singer, who is promoting her first all-pop album 1989, onstage at Bankers Life Fieldhouse for an emotional performance of their hit ballad "If I Die Young."

"Tonight in Indianapolis, @thebandperry surprised the crowd and everyone sang 'If I Die Young' SO LOUD," Swift said on Instagram. "Such a fun show!!"

Taylor Swift, The Band Perry,

Michael Hickey/LP5/Getty Images for TAS

Swift also posted a clip from her performance with the group.

Indianapolis, you looked awesome tonight.

A photo posted by Taylor Swift (@taylorswift) on

"Dear @taylorswift thank you for a magical night," the group said on Instagram, where they posted adorable selfies with Swift. "Dear Indianapolis thank you for a magical sing along. We love you. #1989tourindy."

"Well yeah that was like the most fun night ever," Kimberly Perry added. "Love u @taylorswift."

kiss-n-tell! thx for a wonderful evening @taylorswift!!!! #1989tourindy #?? #??

A photo posted by Neil Perry (@neilperry) on

Swift, who began her music career as a country artist, has brought many surprise celebrity guests to perform and appear with her onstage during her 1989 tour and join her "squad." The list includes her "Bad Blood" music video co-stars Gigi Hadid, Mariska HargitayKarlie Kloss, Hailee SteinfieldLily Aldridge and Lena Dunham as well as girl groups Fifth Harmony and Little MixJustin Timberlake and Avril Lavigne.

Swift is set to perform in Columbus, Ohio, on Thursday and Friday.