Published: Nov 18, 2012 8:19 PM EST
Updated: Nov 19, 2012 7:31 AM EST

Justin Bieber is thanking his haters.

The 18-year-old won favorite pop/rock male artist at Sunday's American Music Awards and gave a shout-out to those who didn't think he would last on the music scene.

He dedicated the award to "all the haters" who said he wouldn't last. Bieber won the night's first award and is also set to perform at the three-hour show.

Usher kicked off the AMAs with green laser lights beaming onstage as he performed a medley of songs, including "Numb," ''Climax" and "Can't Stop, Won't Stop," which featured a smoky floor and a number of backup dancers, as Usher jammed in all black, with the exception of his red shoes.