FC Barcelona will play against Vålerenga as part of the Oslo club's 100th anniversary celebrations. The game will be played at Ullevaal Stadium on Saturday 27 July.
Norway's largest amusement park celebrates its 25th anniversary in 2013 with its biggest season ever. This year's new ride is Thor's Hammer, a spectacular 3D experience opening in in June.
This autumn Mayer is going on a European tour, and 17 October he will perform in Oslo for the very first time. Tickets go on sale Friday 26 April.