She said the honour celebrated 10 years of “hard work and of art and of fun and memories”, adding: “All that matters to me is the memories I have had with you guys, with you the fans, over the years.”
“We’ve had fun, incredible, exhilarating, extraordinary times together and may it continue,” she said.
“I am so lucky to get to do this.”
Before accepting the award, the 29-year-old performed a medley of some of her biggest songs, including Love Story, I Knew You Were Trouble and Blank Space.