Justin Bieber definitely isn't over losing Selena Gomez and he's not over the fact that The Weeknd is now officially dating his ex!

After calling the "Starboy" singer's music "wack," Justin has now taken to Instagram to continue to mock Selena's new man. Instead of attending the Grammys, Justin went out for a sushi dinner, according to the singer, and took to social media to release some frustration.

In answering fans' questions on Instagram Live, when asked what his favorite song is, he answered, "Starboy, by The Weeknd." He paused, laughed for a few minutes so it was clear he was mocking the hit song and its singer, and then said, "We gotta end it now. That was too funny."

Funny, indeed!