Here's something I've digged up from 2ch that might not be ever reported.
Former J-Pop Singer
Azumi Uehara had fallen into vice. Long time anime viewers might remember her for singing one of
Detective Conan's ED
What happened was that
she was suspected of fraud a few years back and disappeared afterwards.
But now it seems that she had resurfaced, out of all places, in a uncensored Japanese Porn under the name of "Nagahara Yui". Observant 2ch denziens even presented proof as follows :-
A cautionary tale of how far some might fall, I think.