Swift, 26, took the stage to give her speech.
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Showing off her slim physique in a skintight sequined Saint Laurent jumpsuit and Giuseppe Zanotti shoes, the "New Romantics" singer acknowledged her fellow musicians, her fans and, finally, her love of over a year, whose real name is Adam Wiles.
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"I think that one of my favourite things about this tour was the camaraderie I felt between all the artists that came out," she began of her massive world tour, which had more than 80 dates in cities all over the world, from Tokyo to Amsterdam to LA to Shanghai to Melbourne.
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"I want to start by thanking Justin Timberlake for the example that he has set for all of us in this room."
She went on to spotlight the many stars who joined her on the road. "There's so many artists there were 48 different artists that came out and surprised my crowds on the 1989 World Tour," she said.
"A lot are here tonight: Jason Derulo, Fetty Wap, Wiz Khalifa, Serayah, Selena Gomez, Nick Jonas, just to name a few. I'm so thankful for everyone that came out to surprise my crowds on the tour."
Then, turning her attention to Harris, 32, she said, "You know, for the first time, I had the most amazing person to come home to when the spotlight went out and the crowds were all gone. So I want to thank my boyfriend Adam for that."
PTI