Forgive my ignorance, but were Marius and Sverre not included on the balcony? I don't see them. Sverre really looks like a little viking (well, the impression I have of them), very cute.
Here is anothyer link, this time of the Royal House at the Palace. The King, The Queen, The Crown Prince, The Crown Princess and Princess Ingrid Alexandra, as well as the people greeting the royals and singing The young Princess is on her mothers arm, waveing to the people while they sing. She looks very sweet.