AceShowbiz -

Rihanna is reportedly ready to tie the knot with her new boyfriend Hassan Jameel. Rumor has it, the "This Is What You Came for" hitmaker and her Saudi billionaire beau are determined to protect their massive fortunes.

"Everything is moving so fast, but right now the priority is working out their individual assets with their attorneys in order to write up an ironclad contract," reveals an insider, "Rihanna loves Hassan, but business is business."

Rihanna is reportedly worth $230 million. The "Umbrella" hitmaker has her own clothing line, as well as millions in real estate. Those properties include a $22 million mansion in her hometown of Barbados, complete with a concierge, access to a private beach, and two docking areas for yachts.

Hassan, meanwhile, is worth $1.5 billion. As a deputy vice president of the family business, his assets include exclusive distributions rights for Toyota cars in Saudi Arabia and seven other countries and a soccer league consisting of 14 teams.

However, the couple is not stressing the details. "They're crazy about each other, but they both know that a prenup is a good idea," the insider tells Life & Style, "Both parties agree that what they bring into the marriage, financially speaking, is what they'll leave with."