The 2 Guns star – who got in trouble with the Boston police numerous times as a teen and who developed a drug addiction before turning his life around – has stepped up to the plate to put Bieber firmly in his place.
The Fighter star told the UK Sun newspaper:‘Justin, are you listening?’
‘Don’t be so naughty, yeah? Be a nice boy, pull your [pants] up, make your mom proud and stop smoking weed, you little bastard.’
But although he came down tough on the Canadian born star he still believes his current problems are not as bad as his were at the same age.
‘He’s a teenager living in a different day and age,’ Mark said.
‘I was in prison before I got a record, and I don’t think he’s been to prison.’
However the former rapper also gave Bieber a veiled warning as his career appears in danger of spiraling out of control if he continues on his current path.