years of work to complete. At the beginning of the first season, the production team worked from Rainbow's original headquarters in Recanati. In 2006, Straffi opened a second studio in Rome for computer-animated projects. During the fifth and sixth seasons, 3D CGI sequences were incorporated into the series for the first time, animated at the studio in Rome. According to the Rainbow CGI animators, the animation of the characters' hair in underwater scenes was particularly difficult, and it was animated separately from the characters. Casting In Italy, the series' voice actors include Letizia Ciampa (Bloom), Perla Liberatori (Stella), Ilaria Latini (Flora), Domitilla D'Amico (Tecna), Gemma Donati (Musa), and Laura Lenghi (Aisha). According to Ilaria Latini, the characters were cast before the character designs were finalized and the actors were shown black-and-white sketches of their roles. The actors record their lines in Rome. Seasons 1–4 were animated to match the Italian voices. Starting with season 5, the animation was synchronized to match the English scripts. The 2011 specials introduced a new cast of Hollywood voice actors. Iginio Straffi himself helped to choose the voices of the main characters, and the actors recorded their lines at the Atlas Oceanic studio in Burbank, California. Molly Quinn voiced the lead role of Bloom, and at first, she tried out a cartoony voice for her character. Nickelodeon advised her to use her real voice instead, saying, "No, we want voices of real girls this time around." For the 2011 cast, Viacom hired popular actors whose names were advertised on-air to attract American viewers; these stars included Ariana Grande as Diaspro, Elizabeth Gillies as Daphne, Keke Palmer as Aisha, Matt Shively as Sky, and Daniella Monet as Mitzi. These actors provided voices for the first two Winx films and seasons three through six. In 2014, Viacom relocated the series' English cast to DuArt in New York City; this was done as a cost-cutting and time-saving measure since Rainbow was undergoing a significant financial loss at the time. Despite the change in voice actors, the series' animation continued to be matched to Nickelodeon and Rainbow's English scripts for the seventh season. Music Original songs have been recorded in about 40 languages for the show. Frequent composers for the program include Michele Bettali, Stefano Carrara, Fabrizio Castania, and Maurizio D'Aniello. One of Nickelodeon's composers, Emmy and Grammy Award recipient Peter Zizzo, joined the team during Nickelodeon's joint production