Taylor Swift paired “august” with “Cardigan” in her 2021 Grammy medley. She also performed “Willow,” a song from Evermore, creating a three-song set spanning both 2020 albums.
“Cardigan,” “august” and “Betty” are often described as a connected trilogy on Folklore. They portray different perspectives on a teenage love triangle involving characters named James, Betty and an unnamed girl associated with August.
The Grammy performance highlighted the relationship between the songs without presenting them as a conventional narrative music video. “Betty” was not included in the televised medley, which is why “Cardigan” is the correct companion track in this question.