Gomez made her first major public appearance at the AMAs a year ago after announcing she was taking time off to deal with issues of depression and anxiety stemming from her battle with lupus. Selena wore slinky lingerie and debuted platinum blonde hairstyle on stage and was joined by DJ Marshmello and a group of dancers for the epic performance.
At the end of the performance, Gomez shrugged and mouthed "thank you" after receiving some applause from the star-studded crowd.
To celebrate the occasion, Gomez stepped onto the red carpet in a Coach leather-jacket minidress and newly-bleached locks.
6th Miss World win draws India level with Venezuela
The 20-year-old from Haryana, who is a medical student, edged out top five contestants from England, France, Kenya and Mexico. Manushi Chhillar and the other four finalists had to face the question and answer round which would determine the Miss World.
While Gomez didn't address the lip-synch rumors, she said in an Instagram Story, "Thank you to my best friend Petra [Collins] for helping me bring it to life". "#AMAs", one Twitter user wrote. "Selena did awesome tonight". All I can say is I'm so grateful that I have the opportunity to be able to share what I love every single day with people that I love. Stay pressed. We Selenators are proud of our idol and for how hard she's worked and everything she's gone through.
At least Selena wasn't the only star to draw criticism for her AMAs performance.
In her brief break she also underwent a kidney transplant and fell in and out of love with fellow singer The Weeknd. "You did great", one fan tweeted. "This Sunday", she captioned alongside a video, in which she's seen rehearsing her song.