Justin Bieber has apologized to Norwegian fans after storming offstage during a gig in Oslo on Thursday night (29Oct15).

The Baby singer was irked when fans started mocking him as he bent down to mop up spilled water at the front of the stage.

Reports suggest one attempted to stop him mopping up the spill and splashed more water on the stage.

In video footage, he reprimanded the over-eager devotees and when they refused to stop reaching out to him, he ripped off his hoodie, stormed off and said, "I'm done, I'm not doing the show."

Fans began serenading Bieber with his song Baby in an effort to lure him back onstage, but he didn't return.

Instead, the pop star took to Instagram and offered up an apology, writing, "Sadly it's Been a rough week for me, long days no sleep, while having to be 'on' as they would say for cameras fans etc.

"In no way did I mean to come across mean, but chose to end the show as the people in the front row would not listen. Hopefully people will understand where I am coming from. I don't always handle things the right way but I'm human and I'm working on getting better at responding not reacting.

"Unfortunately people were affected by this as am I. For the people in the back I am so sorry and for anyone I may have disappointed im sorry. Sorry for wasting the tv people's time I'll be sure to make it up to you next time on tour."

He also reposted footage of his encounter with unruly fans at the front of the stage on his Twitter page.

The meltdown came just a day after Bieber walked off a radio interview in Spain after the hosts asked him to film a YouTube.com skit with them.