The death of Whitney Houston hasn’t diminished the marketing value of her ex-boyfriend Ray J — TMZ has learned the singer just inked a major deal … to fight the war on ingrown hairs. Ray J is officially the new face of Prince Reigns shaving serum … and according to the singer’s rep, the deal is worth up to $1 million bucks … though the rep wouldn’t divulge the exact terms of the contract. A rep for the company tells us Sophie Monk signed a similar deal. Fun Fact — Ray’s former sex tape partner Kim Kardashianhas also dabbled in the body hair removal business — inking a deal of her own with the TRIA laser hair removal system a few years ago. We said it was a “fun” fact … not an interesting fact.