Singer Mariah Carey is reportedly engaged to her billionaire boyfriend James Packer, just eight months after they started dating.

This will be a third marriage for both the R&B diva and the Australian businessman.

Packer proposed to Carey with a 35-carat diamond ring. No wedding date is set just yet, reports eonline.com.

"They fell head over heels in love with one another. It's crazy how perfect they are together, they both know it and couldn't be happier," a source said about the couple.

"As soon as their friendship turned romantic, they have wanted to spend every moment together," the source added.

Mariah Carey was previously married to Tommy Mottola and Nick Cannon. She has two children, four-year-old twins Moroccan and Monroe, with Nick.