Apparently Justin Bieber doesn't mellow out from allegedly smoking weed. It just makes him sort of a jerk.

It does, however, make him a little more laid-back with his schedule -- to the point of inconveniencing and pissing off everyone around him, including the fans that butter his bread.

Radar Online reports that Bieber threw a full-fledged temper tantrum at a fragrance shoot in Copenhagan, Denmark over the weekend -- after arriving six hours late. (One or the other, bro.) In addition to holding everyone up, he also refused to wear the costume that was previously agreed upon.

Maybe he was just upset that it involved pants and a shirt?

"After showing up six hours late, Justin threw a temper tantrum because they wanted him to wear a bell boy hat — but he refused,” a source said. "This kid is quickly getting a reputation as someone that no one wants to work with. It was disgraceful.”

Bieber then reportedly left fans waiting for an extra hour and a half for his local concert performance because he was busy playing ping-pong with his dancers. Whether or not that's a euphemism is anyone's guess, but let's not forget that he is a kid.

According to another insider, he's also a spoiled, entitled one with no clue how gratuities work -- Bieber and maybe on-again girlfriend Selena Gomez allegedly went to “a very upscale restaurant on Friday night for a free meal and even though the meal was complimentary, Justin couldn't be bothered to tip the hard working waiter."

"It was very low class and just disrespectful," the source dished. "Selena acted like a true lady, but Justin acted like an entitled punk.”

A tip for Bieber? A tip for a waiter assures your secrets will be kept.

A tip for Gomez? You are the company you keep, pretty lady.