While on Thursday's Conan, the 45-year-old Patriots Day actor revealed that Bieber had his underwear ads sent over to him. "I was like, 'You don't send a guy pictures like this, in your underwear,'" Wahlberg quipped. "He was proud. It was a big deal for him to do it."
However, the father of four -- who modeled for Calvin Klein in 1992 -- is at a different stage in his life than the 22-year-old pop star. "I'm trying to move away from that image," he admitted. "People give [Bieber] flack for kind of growing up in the spotlight and they say he has a bit of an attitude, but you look at the look on my face. I mean, I was the biggest punk in the world."
"I can say I've done worse things, but, yeah, that's not one of my proudest moments," he added.
Wahlberg had nothing but good things to say about Bieber. "He's a very nice young man. He's a friend of mine. I've spent time with him," he insisted. "He's very nice, young and polite compared to what I was."