Chad Kroeger and Avril Lavigne
05/19/2013 AT 08:40 PM EDT
First the red carpet, then the aisle.
and Chad Kroeger walked the red carpet together – in matching black leather – at the Billboard Music Awards in Las Vegas on Sunday. With Lavigne in a strapless leather dress and Kroeger in a black leather jacket, the couple complimented each other as they posed for photos.
The Nickelback singer, 38, frontman proposed to Lavigne, 28, with a 14-carat diamond ring
over the summer.
The singer recently spilled details about her upcoming nuptials in an interview with Ryan Seacrest on his KIIS-FM On-Air with Ryan Seacrest
"It's going to be quite spectacular, and there's a theme to it," she said. "We're going pretty big, but Chad doesn't even know everything."