The emerging singer walked away with three accolades at last night's ceremony in Canada - including Video of the Year for her breakout hit Call Me Maybe.
Carly also scooped the fan-voted UR Fave Video of the Year and Most Watched Video of the Year.
Justin - who was also honoured at the event - has always supported his fellow Canadian artist, and took to his Twitter page to gush about her recent success.
"IM VERY PROUD OF @CARLYRAEJEPSEN 2nite! SHE WAS A SUPERSTAR!! PROUD OF YOU! CANADA STAND UP! (sic)," he exclaimed on his Twitter page.
Justin, who picked up the trophy for International Video of the Year by a Canadian, walked the red carpet with his two-year-old half-brother, Jaxon. The 18-year-old heartthrob loved proudly parading his sibling at the event.
"GREAT NIGHT here in CANADA!! Glad to be home. Got to rock the carpet with my lil bro JAXO! He killed it," he quipped, before adding: "and then U the Fans showed me so much love! Thank you. These awards were ours tonight. love u and happy to rep u! (sic)"
Katy Perry, LMFAO and Nelly Furtado all performed at the music awards ceremony, which was held in Toronto.
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This is a wonderful opportunity to develop a creative project. Keep a notebook where you can store images, ideas, phrases and melodies that pop into your mind at odd intervals. This treasure trove will help you blast through blocks that held you prisoner in the past. It will also help to devote a set time each day to artistic pursuits. Exercising your imagination on a regular basis will cultivate contentment. There's more to you than your job title.More