Tanning Mom Releases a Pop Song ... WHY WHY WHY?

Just when you thought looking at "Tanning Mom" Patricia Krentcil was the worst thing you could put yourself through -- TMZ has now obtained a snippet of her new song ... which will do for your ears what these photos did to your eyes.

The song, called "It's Tan Mom," will come out in iTunes on Monday morning. We're told Krentcil figured if Octomom could release a song, she could do one better.

We dare you to listen.