Taylor Swift covers Earth, Wind and Fire's 'September'
Taylor Swift/YouTube

Superstar Taylor Swift has taken Earth, Wind and Fire's "September"--an upbeat, fun 1970s song that's a staple at weddings and celebrations everywhere--and completely turned it on its head.

As part of the Spotify Singles series, which typically features both an original song and a cover, Swift opted to take on the funk classic but with dramatic changes, slowing it down and featuring a banjo to create a slow, folksy ballad. And a little lyric change--the date "the 28th night of September," rather than the "21st night" from the original--has fans wondering as to the significance of the day, especially since a statement about the release said the Swift chose the song for "sentimental reasons."

The extreme style changes have led to some backlash on social media, particularly from Earth, Wind and Fire fans, but Swift has some support from both the group's lead singer and one of the song's writers.

"“'September’ was my first hit and favorite song of mine I ever have had the joy of being a part of," co-writer Allee Willis told Billboard."Taylor Swift is the absolute cherry on top of a very soulful and happy sundae."

Lead singer Phillip Bailey also commented, saying "music is free like that" and that he "ain't got nothing but love" for Swift.

Swift also performed "Delicate," from last year's Reputation, in a stripped-down acoustic format. Both songs were recorded at the Tracking Room in Nashville, Tennessee.

Fans can see Swift live when she kicks off a stadium tour in May. Tickets are on sale now right here on AXS. If you'd rather hear the original version of "September" live, Earth, Wind and Fire also has a few shows coming up this summer.