The backlash over Miley Cyrus' new body-grinding, panty-sporting, sexed up music video has already begun -- with a powerful parents organization ripping Miley for turning her back on young fans.
The video in question is "Who Owns My Heart" -- in which a blindfolded Miley (who's still 17 years old BTW) can be seen writhing around on a bed in her underwear ... before entering some other sexually charged situations.
Now, Tim Winter -- President of the Parents Television Council -- tells TMZ, "It is unfortunate that she would participate in such a sexualized video like this one."
Winter continues, "It sends messages to her fan base that are diametrically opposed to everything she has done up to this point. Miley built her fame and fortune entirely on the backs of young girls, and it saddens us that she seems so eager to distance herself from that fan base so rapidly."