Ray J benefits from Kim Kardashian's nude photos.

Remember Ray J? Well, he is Brandy's little brother who made that famous sex tape with Kim Kardashian, and he still earns an income each time the video is purchased.

According to TMZ, Ray J has a knack for making money when Kim Kardashian gets naked ... and he hit the jackpot again with her nude photos released last week.

The photos triggered renewed interest in their sex tape "Kim K Superstar," and sources at Vivid Entertainment say sales of the video have dramatically spiked ... so much so, Ray J will pocket $50K from the last week alone ... way up from what's he's been getting.

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Ray has been getting around $90K every 3 months, so this is a real crazy increase.

Steve Hirsch, president of Vivid Entertainment, tells TMZ, the most recent spike makes "Kim K Superstar" the biggest selling celebrity sex tape of all time.

Until last week, the title holders were Pamela Anderson and Tommy Lee.


Photo credit: MadameNoire.