2 Guns actor Mark Wahlberg has a message for troubled popstar Justin Bieber, “Don’t be so naughty!”

Wahlberg appeared on a live web with The Sun where he had a special message for the “As Long As You Love Me” singer. "Justin, are you listening? Don't be so naughty," Wahlberg said as quoted by New York Daily News. "Be a nice boy, pull your trousers up, make your mum proud. Stop smoking all that weed, you little bastard."

Bieber’s reputation took a shocking turn for the worse after he was photographed smoking weed. From there, the 19-year-old singer was 2 hours late for a performance, passed out on stage, spit on his fans, peed in a restaurant mop bucket and swore at former President Bill Clinton among other radical questionable behavior.

Despite his previous slams, Wahlberg still calls for support for the Canadian singer. "He's a kid! Let him live his life," The Departed actor states. "He's a teenager, obviously living in a different day and age. Everybody's got a cellphone and paparazzi everywhere. I was in prison before I got a record out and I don't think he's been to prison. I don't think he wants to go."

Image: NBC