Don Draper's at it again...

Hamm reckons the 20-year-old singer - who is facing charges for Driving Under the Influence (DUI), resisting arrest and possessing an invalid driver's licence in Miami in January (this is resulting in a trial which Bieber now wants to 'delay', by the by) - needs a dose of reality and should learn "basic life skills" so fame doesn't render him utterly useless in later life.

The 43-year-old actor told the May issue of Men's Fitness magazine: "Look at Bieber or whoever. You're like, 'What the f**k, man? What are you doing? Why?' There's no one telling those people no, and it's a shame... You see people in the world and you're like, 'Do you know how a washing machine works? Do you know how to wash a dish?' Life skills are something we're missing... just sh*t you needed to learn in life. There used to be a class that kids had to take in high school called home economics, which was cooking and sewing and just sh*t you needed to learn in life."

He also thinks Justin needs "a mom or a dad or a really good friend who can say, 'Hey, sh**head!'"

Jon previously lashed out at the likes of Kim Kardashian and Paris Hilton, for being famous for "being a f**king idiot" in 2012.

He said: "Whether it's Paris Hilton or Kim Kardashian or whoever, stupidity is certainly celebrated. Being a f**king idiot is a valuable commodity in this culture because you're rewarded significantly. It's celebrated. It doesn't make sense to me."

Jon (the) Hamm doesn't 'get' Miley Cyrus or One Direction. Or Katy Perry.

Kim Kardashian: 'Jon Hamm is careless'