Kardashian wasn't the only star celebrating Bieber's big win. ET caught up with Selena Gomez
, who was thrilled about her ex-boyfriend's accolade. "I'm very happy for him. Honestly, so cool," she told ET after Bieber won for his dance track, "Where Are U Now," which features Skrillex and Diplo. "They have such a cool energy amongst all of them to be able to create something like that. It's really great."