JENNIFER LOPEZ INSANE LAWSUIT Man Claims She Begged Him for Naked Pics ..

Jennifer Lopez has been dragged into what looks like the craziest catfish debacle of all time -- a man just sued the singer, claiming she duped him into sending her naked photos in the mail ... but it appears a rando 53-year-old woman is secretly behind everything.

Rodrigo Ruiz filed the $10,000 suit against Lopez in L.A., claiming she sent him a letter out of the blue in 2008, demanding he reply with naked photos ... as well as his demo CDs. He claims the letters led him to believe he had a chance at a music career -- and even a romantic relationship with Lopez, but she never followed through and he eventually gave up hope.

Ruiz says he was so depressed he sought out professional help.But records show the P.O. box he replied to is owned by a 53-year-old L.A. woman.

Or de!