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Justin Bieber Is Sorry He Didn't 'Bow Down' To Seth Rogen

Looks like there's slim chance of a bromance between the Biebs and Seth.

This is starting to get ugly.

Seth Rogen has made no secret over the past few months that he's not a Belieber. He even went so far as to call Justin Bieber "a piece of sh--" on Twitter back in January, following the pop star's DUI arrest.

Well, it seems Justin caught wind of Seth's comments. On Thursday (May 8), he fired back at the "Neighbors" star, sarcastically apologizing for failing to "bow down" when he met the actor, adding in his own defense that he was "probably a bit shy and didn't want to be over the top."

Justin did, however, end the tweet saying he still loves Seth's movies. So maybe he's holding out hope that there's a chance for a bromance between them after all? Most likely not, but we're keeping our fingers crossed.

Check Out Our Interactive Justin Bieber Tat Map.

Now, back to that tweet. Justin's most likely referring to Seth's recent interview with Howard Stern, where he recalled his not-so-pleasant encounters with the Biebs.

"He's a good example of someone you meet, who you think you're going to hate, and then you get to hate him as much as you thought," Seth said. "You meet him, and he lives up to every one of your expectations of how you hope he will be."

The two first met a few years back on a German talk show, where someone asked Rogen if he wanted an introduction.

"I went outside to meet him and he was acting like I asked to meet HIM! It was very nonchalant, 'Yo man. What's up?' and I was like, 'What the f--k, I don't give a f--k about [you], I don't want to meet you," he said. "Don't act all nonplussed to meet me. I didn't want to meet you. I was totally cool not meeting you. ... But I was like, fine, I wouldn't have said anything, I was like, 'He's a bit of a mother---er.'"

Can't we all just get along?