Seth Rogen is opening up about his tweet earlier this year that Justin Bieber was a "piece of s***."
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"I met him a few times," Rogen told Howard Stern on Monday on his Sirius show. "He's a good example of someone, who you meet, who you think you are going to hate and then you get to hate him ... you meet him and he lives up to every one of your expectations."
Rogen added that he first met Bieber backstage at some German talk show just at the very beginning of the Bieber craze.
"Someone came to the door and was like 'Justin Bieber wants to meet you,'" Rogen said.
The actor agreed and said when he went outside to meet the young pop star, Bieber made it seem like Rogen had wanted to meet him, instead of the other way around.
"What the f***, I don't want to meet you!" Rogen said of the first encounter. "Don't act all nonplussed to meet me. I didn't want to meet you."
Rogen attributed it to Bieber being young, but when he met him a few years later, Bieber was the same way, he said.
"I saw him again at like an MTV awards show, he literally had a snake wrapped around his f****** wrist that he was wearing," Rogen explained. "I talked to him for like five minutes. ... No humility, no awareness, no sense that 'I appeal to young, young people, maybe a grown man who works in comedy doesn't f****** give a s*** about me. Maybe I should act in such a way that perhaps this isn't the great experience of his f****** life.'"
He added, "I remember thinking 'He's a piece of s***'"
Rogen then said he wouldn't have said anything but Bieber started drag racing and egging people's houses.
"Then I came out of the meeting and it had been retweeted like 200,000 times," Rogen said. "I seemed to have tapped into something here."