Billionaire and Napster co-founder and first president of Facebook, Sean Parker, has a net worth of about $3 billion. His wife, Alexandra Lenas, is quite the talent in her own right, with a film appearance in Mr. Considerate in 2011. However, she’s also known as a successful singer and songwriter, too. You know you’ve made it to the peak of musician accolades when you get to be on MTV, which she has been able to check off her list.