Swift played "You Must Calm" and "ME!" as well as his 2014 hit, "Shake It Off" for the final.
"You can see absolute disgust and anger when she shouted" Liars and Dirty Dirty Crusts ", then she went into the light of day and stopped," wrote a fan on Tumblr.
"Liars and filthy dirty you know who you are," wrote another.
Another person tweeted: "Me when @ taylorswift13 just shouted" WORLD MOTHERS AND SURGEONS "#PrimeDay
Not to mention Braun's name, Swift congratulated her supporters and pointed out that she felt good.
"One thing that has been really wonderfully coherent since I make music is that I write everything, and that's my favorite thing, write songs, then they come out of the world and I'm really lucky you're nice enough to worry about those words that I've written, sing them to me, "she says. "It's legitimately the coolest feeling in the world."