Celebrity: Akon
Second job: Diamond miner
The deets: It's a modern truism that rappers and R&B artists love diamonds, but six-time Grammy nominee Akon took this love to a new level when he bought a South African diamond mine. While he's taken some heat for the purchase, he first deflected it as nonsense, telling the UK's Independent in 2007, "I don't even believe in conflict diamonds," before later changing his tune on that score. Still, he wears his crop, and while he hasn't disclosed his profits, there is one endeavor that has earned him even more than owning a diamond source -- discovering and signing a little performer by the name of Lady Gaga.