Now, the two are preparing to walk down the aisle. Mariah explained how their relationship is built off of a shared sense of humor and the fact that they both understand one another's busy schedules.

"I don't expect him to be at every little thing that I do, and vice versa," she told the publication. "He's got a lot of stuff on his plate and so do I. There's a mutual understanding."

The other mutual understanding is the fact that they're both very wealthy entities coming together, and some stuff simply needs to be taken care of before saying "I do."