Justin Bieber is to play a string of unannounced European shows.

The "Boyfriend" hitmaker revealed on his Twitter page that he is to embark on a number of "secret" gigs, beginning in Oslo, Norway, tonight as part of a TV special he is filming.

"Ok. going to board. OFF TO EUROPE! PHASE 1 of operation secret concerts! lol. OSLO first stop. See u soon. when i land #DieInYourArms and #BOYFRIEND will be out!! Countdown and then #BIEBERBLAST !!!! thanks! see u soon. much love. #BELIEVE. (sic)" he wrote on his page.

"OSLO...press today and then a couple songs maybe? stay tuned. PARIS tomorrow! ..here r the details...at 920 2nite Im going to do a free show 4 u the fans at the Opera House here in Oslo.. the show is part of my #AroundTheWorld TV special and I will be doing 6 songs, 4 new, 2 old before i leave.(Sic)" he added.

However, the 18-year-old star appealed to fans to be sensible as the gig will not go ahead if there are security problems: "NORWAY - please listen to the police. I dont want anyone getting hurt. I want everything to go to plan but your safety must come first..for the show to happen u must all listen to the police. we are all concerned for your safety and i want what is best for u. please listen and tonight we will have some fun. love you and im excited to see you all. NORWAY...THANK YOU FOR HAVING ME! (sic)"

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