Possible Clues:

• Singer with the 2014 hit 'Chandelier'
• One-named singer with the 2014 hit “Chandelier”
• 'Some People Have Real Problems' singer
• 'The Girl You Lost to Cocaine' singer
• Singer who keeps her face covered while performing
• Pop singer known for wearing face-covering wigs
• Singer found at the ends of five country names
• Adelaide-born pop singer
• One-named Australian pop singer
• Australian singer/songwriter