Seth Rogan sorry I didnt bow down when I asked 2 meet u was probably a bit shy and didn't want to be over the top but still. love ur movies.— Justin Bieber (@justinbieber) May 8, 2014
The somewhat sarcastic apology is actually pretty mild considering some of the things Rogen has said.
Rogen vociferously complained about the two Canadians' first face-to-face meeting. Bieber allegedly asked to meet Rogen backstage, and then acted "too cool for school" once they were introduced.