Selena Gomez, are you listening? As promised, Justin Bieber released his first new song in ages, "Heartbreaker." The track is part of the 19-year-old Music Mondays stunt, in which Bieber will release a new song every Monday for 10 weeks. "These songs are different," the Great Wall of China-climbing phenom tweeted. "These are my #journals."

Accordingly, the brooding "Heartbreaker" is semi-autobiographical, Bieber claimed. "It's a song for people going through heartbreak—like I was when I wrote it. It means so much to me to be able to share what I was, and still am, going through, with my fans. I'm very proud of this song and I hope it gives my fans some insight into my heart."

Bieber and Gomez, 20, parted ways -- maybe for good this time -- earlier this year.

Listen to "Heartbreaker" now and tell Us: What do you think?