4. Jimmy Buffett

Estimated net worth: $600 million

The late rock star didn’t just sing about Margaritaville - he trademarked it. Jimmy Buffett turned a laid-back beach anthem into a full-blown global brand, worth billions in revenue. While others chased radio hits, Buffett built a lifestyle empire that included restaurants, hotels, retirement villages, frozen cocktails, and even a Broadway musical (Escape to Margaritaville), featuring hits like Fins, Cheeseburger in Paradise, and Volcano. After his passing in 2023, his family and business partners continue to run Margaritaville Enterprises - a licensing juggernaut that still brings in over $2 billion a year.