Ed Sheeran committed a friendship faux pas at the 2015 Grammys — he performed with his bestie Taylor Swift's ex, John Mayer. The singer-songwriter is also rumored to be dating the "Shake It Off" singer's pop star nemesis, Katy Perry, making it even more shocking that they shared the stage!
CLICK HERE FOR A TIMELINE OF KATY AND TAYLOR'S BROKEN FRIENDSHIP!
The duo performed Ed's hit, "Thinking Out Loud."
While they sounded great together, we wonder what the "Blank Space" singer was thinking when she first saw them on stage together.
During his second performance, she danced like crazy to her BFF's singing, so we don't think she held it against him.
But we don't know if she danced to "Thinking Out Loud." CBS didn't show a Taylor reaction shot during that performance!
Do you think that Ed betrayed Taylor? What did you think about his performance? Sound off in the comments!