Noah Cyrus is refusing to take any shtuck for her ultra-skimpy and braless Kim Kardashian Halloween costume. The 20-year-old singer and sister to Miley Cyrus dropped jaws twice this weekend – round one brought the "Lonely" singer in a velvet minidress channeling "Sabrina The Teenage Witch," with the beauty returning for round two via her take on makeup mogul Kim K. Noah, followed by 5.9 million on Instagram and fresh from bending over without underwear, is defending her second look after backlash. Check it out below.