Mariah Carey wants to get married this summer.

Mariah Carey and James Packer

Mariah Carey and James Packer

The 'Hero' hitmaker got engaged to boyfriend James Packer last week and though they are still legally wed to their estranged spouses, Nick Cannon and Erica Packer, she is already making plans for a huge ceremony in Europe.

A source said: "Mariah is just beyond excited right now.

"She has wanted to be his wife pretty much since they first got together, and has already started to plan what type of wedding she wants to have.

"Mariah wants the wedding to be this coming summer and she said she would really love it if they could get married where they first fell in love, in the Mediterranean region.

"She wants this wedding to be the biggest and most expensive wedding that the world has ever seen!"

Mariah, 45, had reportedly been hoping the 48-year-old businessman would pop the question on Valentine's Day (14.02.16) but couldn't believe it when he pulled out an $8 million ring last week.

The source told RadarOnline.com: "She was blown away.

"She knew that he was going to propose to her, but he told her that he could not wait any longer."

And friends of the 'Fantasy' singer - who has four-year-old twins Moroccan and Monroe with Nick - couldn't be happier about her engagement.

The source said: "All of her friends are really happy for her because when Mariah is happy, everyone around her is happy.

"She deserves a man who will treat her like gold and James does better than that. He treats her like platinum."