Approximately 100 angry Australian fans stormed out of Britney Spears‘ Perth concert last Friday after only three songs, disgusted by the singer’s performance. They were apparently disappointed by her lackluster performance and lip-synching. They also complained that the show was impersonal — Spears shouted out “What’s up Australia?” instead of mentioning the city by name. This morning, Spears’ manager defended his client in The Australian paper, stating the singer was upset with what critics had said. The Perth performance was Spears’ first show of her 15-date concert series in Australia. Australian politicians have called for new laws to force music promoters to say in advance whether a concert will be live or lip-synched.