The couple's first daughter, Violet Maye, who was named after Grohl's grandmother, was born on April 15, 2006. These days, Violet is a singer and occasionally performs with her father.

The lead guitarist and singer of Fleetwood Mac as well as a music producer, Lindsey Buckingham, was born in Palo Alto, California, on Oct. 3, 1949, to Rutheda and Morris Buckingham.

Being famous doesn't always mean you're rich, but these 20 celebrities are both. And they didn't just earn money from their talent. They're also very successful business owners.