The 28-year-old pop star and 38-year-old Nickelback lead singer exchanged vows in front of about 50 guests Monday night, the report said.
"Yes, they're married," one source told the magazine.
"It was a wild, all-night party with drinking, dancing, incredible food and lots of laughter and tears of happiness," a second insider said.
The couple announced their engagement in August 2012.
Notable deaths of 2014 [PHOTOS]