seasons 4, 5 and 6, all four judges worked together to collectively choose 24 acts (six from each category) for the next round, home visits, where they find out which category they will mentor. From season 7, bootcamp were now based around the five seat challenge, where each judge chose their five acts to go through to the super home visits. From seasons 1 to 7, the super home visits stage (formerly judges' houses in seasons 1–2, and home visits in seasons 3–6), saw the judges and their remaining six acts travel to four different places of the world. From season seven, all four judges and their remaining five acts traveled to the same location. During the super home visits, each act performed one song in front of their mentor and celebrity guest judges. Afterwards, each mentor and their guest judges narrowed down the acts to three for the live shows. Live shows and winner's prize The finals consisted of two live shows, the first featuring the contestants' performances and the second revealing the results of the public voting, culminating in one/two acts being eliminated each week. The live shows were filmed at Fox Studios in Sydney. In season 1, the shows were filmed at Hisense Arena (formerly Vodafone Arena) in Melbourne. In season two, the live shows were broadcast on Sunday and Monday nights, but moved to Monday and Tuesday nights for seasons three and four. In season five, the live shows returned to Sunday and Monday nights. In season seven, the live shows were once again broadcast on Monday and Tuesday nights. In the initial performance shows, each act performed one song (two songs each during the Semi-Final and three songs each during the Grand Final) in front of the judges and a studio audience. The acts usually sung over a pre-recorded backing track, and backup dancers were commonly featured as well as stage props. Acts occasionally accompanied themselves on guitar or piano. From the second season, each performance show had a different theme; each act's song was chosen according to the theme. The acts' mentors picked the song for them and critiqued their performance in order to get it perfect for the live shows. A celebrity guest connected to the theme was often invited onto The X Factor, and clips were shown of the guest conversing with the contestants at rehearsal. After each act had performed, the