Weekend music news: Bieber roasted, new music from Grimes and more

American popular culture finally realized two of ts deepest fantasies last night -- a new Kendrick Lamar LP dropped (more on that here), and we got to take Justin Bieber to the woodshed and tell him what a jerk he’s been lately.

Comedy Central’s greatest roasting coup yet was recorded over the weekend, with a bevy of comedians including Hannibal Buress, Kevin Hart and Natasha Leggero doing the comedy equivalent of shooting tin cans off a fencepost. That is, making fun of the now 21-year-old Justin Bieber to his face.

Buress probably got the best job of the night by being plainly honest about his intentions. “They say that you roast the ones you love, but I don’t like you at all, man. I’m just here because it’s a real good opportunity for me,” he said, according to an account by Rolling Stone. “Actually, you should thank me for participating in this extremely transparent attempt to be more likable in the public eye. I hope it doesn’t work.”

Bieber seemed a bit shaken by that, and at the end truly apologized for his life thus far. “I’ve turned a lot of people off in the last few years. But I know I can still put out good music and turn everything all around.” The roast airs March 30 on Comedy Central.

Speaking of angry young musicians looking to make some changes, the teen metal band Unlocking the Truth is looking to back out of its five-album, potentially $1.8-million deal with Sony. The teenage trio signed after a clip of them performing their virtuosic speed-metal in Times Square went viral. The band had recently played Coachella and collaborated with tour mates Marilyn Manson onstage, but now the group is hoping for a quick departure from its major.

Guitarist Malcolm Brickhouse made his comments at Saturday’s SXSW world premiere of “Breaking a Monster,” a new documentary about the band’s rise to young stardom.

And in other premiere news, two new singles won the horse race for attention over the weekend. Grimes and Jack Antonoff’s Bleachers project teamed up on on a new single “Entropy,” written for the new season of HBO’s “Girls.” The song’s a slow, airy R&B number that fits closest to Grimes’ aesthetic but gets a populist kick from Bleachers’ sturdy writing.

Instead of Hannah Horvath and her increasingly villainous “Girls” crowd, we would rather spend our next weekend with the crew at Rae Sremmurd’s video for “Throw Sum Mo,” which brings the young rap duo to a strip club/roller rink with Nicki Minaj, Young Thug, Migos and Mike Will Made-It, along with a bunch of skating strippers. I hope Moonlight Rollerway in Glendale doesn’t object when I try to re-create this scene there.

Follow @AugustBrown for breaking music news.