Watch the touching moment and listen to Swift open up about her recent struggles.
Thompson took to social media after the show expressing her gratitude towards Swift. "I still can't believe tonight. I still can't believe you did this. This will forever be one of the most special moments of my life. Thank you @taylorswift for your beautiful heart and for never forgetting my Ro. I love you to the moon and back. #ronan #fuccancer #secretsong #1989 #allhailqueentaylor #myhero #swiftieforlife #rockstarronan @ronanfoundation," she captioned an Instagram video from the concert.
It's easy to get on Swift's case over music distribution or drama with Nicki Minaj, but moments like this remind us why Swift remains one of the most sincere in music.