Malaysia should pull the plug on the Kuala Lumpur leg of U.S. singer Gwen Stefani’s upcoming Asian tour because of her indecent dressing and obscenity, a Muslim students’ group said on Tuesday.

The 10,000-strong National Union of Malaysian Muslim Students said Stefani’s August 21 concert, which is part of her ‘Sweet Escape’ tour, would clash with local Asian and Islamic values.

Ethnic Malays, who are by definition Muslims, make up just over half of Malaysia’s 26 million people. Ethnic Chinese and Indians, who are mostly Buddhists, Christians or Hindus, form sizeable minorities.

Hilmi also criticized Malaysian mobile phone firm Maxis Communications for promoting the concert.

Maxis officials could not be immediately reached for comment.