The second part of the movie is based in Spain. All four girls plan to attend the Barcelona music festival when Galleria enters them into a festival as a group. They then come across an aspiring solo singer and her manager, who makes countless efforts to split them up. Things start to go downhill when they discover that they have broken a very significant rule, which may hurt their chances to become big one day.
...an interminable piece of fluff that holds absolutely no appeal for viewers outside the film's target demographic of teenaged girls (undiscriminating teenaged girls, at that).