by Chelsea StewartBuzzFeedBuzzFeed StaffI'm Chelsea, the Weekend Editor at BuzzFeed, where I cover everything from pop culture and politics to TV and celebrity news. This post contains mentions of disordered eating. Jameela Jamil is continuing to use her platform to call out the troubling trend of thinness in Hollywood. Axelle / Getty Images If you haven't seen it, HuffPost recently noted that "extreme thinness is back" - and the body positivity movement that marked the 2010s appears to be fading away.