Singer Mariah Carey has sparked engagement rumours with her boyfriend James Packer, who is an Australian businessman and investor. The Heartbreaker singer was spotted wearing a sparkling jewel on her left ring finger when walking hand-in-hand with her beau at his casino here, reports dailymail.co.uk. “Mariah Carey’s butterfly ring is NOT an engagement ring. She has been wearing it for over a decade…. Please stop with the ill-informed speculation,” Mariah Carey Australia fan page wrote.