There’s so much to do! Before walking down the aisle, Selena Gomez and her fiancé, Benny Blanco, need to hire a wedding planner, make a guest list and choose a venue for their big day. They also have to hash out a prenuptial agreement. “Selena adores Benny, and she’s got zero doubt in her mind that they’ll last. She wouldn’t have said yes to his proposal otherwise,” a source exclusively tells Life & Style. “But at the end of the day, Selena has to protect herself.” Back in September, the “Good for You” singer, 32, became an official billionaire, thanks largely to her Rare Beauty brand. “It’s a business Selena built from scratch and is justifiably proud and protective over,” notes the source. Fortunately, Benny, 36, doesn’t have an issue with signing on the dotted line before they tie the knot. “He totally gets it and wouldn’t dream of challenging Selena on this issue at all,” Life & Style’s source says of the music producer, who has an estimated net worth of $50 million himself. “Besides, Benny’s pretty successful, too, so it’s not like he’s going to be dependent on Selena to support him. That’s actually one of the things she loves about him most.”