These days, Hammer has his own record label and still performs about 50 concerts a year. However, there's a side to Hammer that a lot of people don't know about—and some of his interests and accomplishments may surprise you. In his spare time, Hammer...

• Preaches and officiates friends' weddings
  
• Manages 22 mixed martial artists
  
• Helps develop iPad apps
  
• Invests in Internet start-up companies
  
• Lectures about new media at places like Harvard, Wharton, Stanford and Oxford
  

"I think it is a shock to people to find out that MC Hammer is a super geek," he says.