Forbes recently named B.o.B. as one of hip-hop's top earners with an income of $5 million in the past year, but the Cash King is putting his money to good use - by giving it away. During his 23rd birthday bash this week, the rapper donated $10,000 to the Hosea Feed the Hungry and Homeless, an Atlanta-based non-profit that helps at-risk and homeless individuals and families become self-sufficient.

In addition to putting his two cents into the cause, B.o.B. challenged others to meet his donation.