The band, who shot to fame as teens, offered the controversial star some advice on handling fame
They were thrust into the music spotlight when their debut single shot straight to number one around the world in 1997 - so Hanson know all about the pressures of fame at a young age.
So who better to offer some advice to Justin Bieber on how to handle it all, and the first thing they told him was to have less people on his payroll.
Hanson, made up of brothers Isaac, Taylor and Zac, said the controversial teen star should be told what not to do more often.
Hanson have offered Justin Bieber some wise words of wisdom about handling fame (WENN)
Speaking to The Morning Show's Larry Emdur and Kylie Gillies as they promoted their oncoming Aussie tour, the band said Justin is under a lot of pressure as the world's biggest pop star.
Taylor said: 'For us it was always about the music, being singers and musicians first. I think he's under a lot of pressure and you need people around you to tell you, "You know what? You shouldn't do that".'
And he joked when he referred to one of Justin's pets and added: "Someone was always there to tell me not to buy a monkey."
And Zac added: "Isaac was usually telling me to wear clothes in public and not to wear a gas mask. He needs brothers or someone who will act like a brother."
The eldest brother, Isaac, said the problem is that Justin is surrounded by too many people fawning all over him and added: "There are a lot of sycophants, that's the problem, that a lot of artists, especially solo artists they find themselves in a situation where everybody is paid to be around them.
"If they don't have a good relationship with parents or friends that keeps the relationship real, then it's easy to lose yourself.
"It's always good to have people around you who are not on your payroll."
