A Ghost") 18 May Themes: Audition song, Winner's single Group Performance: "I'm Not the Only One"/"I Need A Dollar" Musical guests: Stan Walker and Natalie Bassingthwaighte ("Signed, Sealed, Delivered (I'm Yours)") Notes On 22 May 2015, the performances of two acts entered the NZ Singles Chart. Beau Monga's performance of "The Roimata Song" debuted at number 7 and Nyssa Collins' performance of "Don't Dream It's Over" debuted at number 8. Charity single In April it was announced that the finalists had recorded a charity single, a cover of Rachel Platten's single "Fight Song". The charity single was released on 13 April is in aid of Ronald McDonald House Charities in New Zealand. The single debuted at number 13 on the Official New Zealand Singles Chart. The final 13 acts performed the song live on the week six results show. Reception Critique and controversies Producer interference In December 2014, vlogger Brad Fisher claimed that during a taping of the judges' auditions, he saw the show's producer giving the judges hand signals to guide them on which contestants to put through to Boot Camp. However, judge Stan Walker denied the claims, saying that while the producers give the judges background information on the contestants, it was up to the judges to choose who goes through. Natalia Kills outburst During the filming of the final judges' auditions session in December 2014, while giving feedback to busker Sally Faherty, judge Natalia Kills used strong language, including profanity, to admonish audience members. Some members of the audience were shocked at the outburst and walked out. A TV3 spokeswoman said both the network and Kills apologised for the incident. The incident was featured in the final audition episode, with the profanity bleeped out. Faherty was also heard using bleeped language backstage. Shae Brider In the sixth audition show, singer Shae Brider auditioned and was put through to the Boot Camp round. In the episode, Brider revealed that he had been involved in a 2004 murder in Wanganui and had served six years in prison for manslaughter. In reaction to criticism from the public and media, MediaWorks New Zealand issued a statement saying that Brider's criminal record had been fully disclosed when he entered The X Factor and that the New Zealand justice system considers that Brider has paid his debt to society and apologised for any distress the episode may have caused viewers. Donna Travers, the