Mark Wahlberg is weighing in on Justin Bieber and his bizarre behavior over the past few months. Just this past weekend, the 19-year-old pop star and his entourage were involved in a violent incident at a Southampton nightclub.

Bieber allegedly got into a fight with a male clubgoer after the man’s female friend tried to flirt with the singer. Prior to that, Bieber has been in the news for peeing in public, getting into altercations with the paparazzi and showing up late for his own concerts.

“Justin, are you listening? Don't be so naughty, yeah? Be a nice boy, pull your trousers up, make your mom proud and stop smoking weed, you little b--tard,” Walhberg, 42, told The Sun during a webchat. "He's a teenager living in a different day and age.

I was in prison before I got a record out and I don't think he's been to prison. He's a nice enough kid and you're going to be a teenager, but if you're being a teen in the spotlight you're going to be criticized for it. This career can be short-lived - you might as well be the best you can while you're doing it.,” the actor continued.

Wahlberg is not the first celebrity to try and share advice with Bieber. Just last month, his friend Miley Cyrus also told The Sun, “I told Justin to take a bit of time out and people aren’t so obsessed with you and nitpick.  “When you’re not around, all they want is your music. They want to see what the next thing is. But when your music is out they just want to talk s--t about you.”