He was initially mentored by Natalia Kills .
He was initially was replaced by former Australian judge Natalie Bassingthwaighte after Kills was removed from the show due to a bullying controversy in the first live show .
He was initially mentored by Natalia Kills , but was replaced by former Australian judge Natalie Bassingthwaighte after Kills was removed from the show due to a bullying controversy in the first live show .