Prince Joachim openly criticised his mother after she decided to strip his children of their royal titles last September - but he appeared to be all smiles when attending the glitzy party in Copenhagen.
In an interview with Australia s 9Honey , Sydney-based Nikolai admitted: Not that I had any formal responsibilities before, but now I am officially free of them anyway.
The model, 23, has enjoyed a getaway to Château de Cayx in the South of France, which was purchased by his grandparents Queen Margrethe and the late Prince Henrik in 1974.
Queen Margrethe, 83, was pretty in pink as her ship docked at Sondeborg after a tough year in which she was at loggerheads with her son Prince Joachim over his children s princely titles.