Jon Bon Jovi Slams Justin Bieber: Calls Artist An 'A--Hole' For How He Treats Fans

This has not been the best week for Justin Bieber despite winning the first-ever Milestone Award at the Billboard Music Awards on Sunday night.

Not only was he booed by the audience as he accepted the award, for which he beat out competition from Taylor Swift and Bruno Mars, but he was also dissed by rocker Jon Bon Jovi this week.

Back in March, Bieber reportedly showed up two hours late to a concert performance in London, causing his “Beliebers” to become angry at the 19-year-old. Scheduled to begin his performance at 8:30 p.m. London time, Bieber did not hit the stage until 10:20 p.m. forcing many young fans -- whose parents had arrived to ferry them back home -- to leave without watching the show.

"Everyone was on edge and as more time passed, everyone was getting more worried and booing,” one fan tweeted, an NBC report said.

“Every generation has guys that do that, none of that is new,” Bon Jovi told the London Evening Standard. “They run the risk of disrespecting their audience members who have worked hard to pay for their ticket, to give you the permission to take two or three hours of their lives — or in that kid’s case, 80 minutes of their lives.

"Do it once, you can be forgiven. Do it enough times and shame on you. They won’t have you back. Then it just becomes a cliché. It’s really not cool — you’re an a--hole. Go to [expletive] work!” the 51-year-old artist said.

Bieber, after accepting his “Milestone Award,” said he wanted to be taken seriously as an artist.

"I'm 19 years old. I think I'm doing a pretty good job," Bieber said. "Basically from my heart I really just want to say it really should be about the music. This is not a gimmick and I'm an artist and I should be taken seriously."