2. Precious (2009)

Don't be fooled by the promise of appearances by Mariah, Lenny Kravitz, and the always jaw-dropping Paula Patton. You won't find any sweet serenades in 2009's quintessential feel-bad film—only plot twist after stomach-turning plot twist, most of which concern an overweight 16-year-old girl impregnated by her father (and all of which couldn't make you look like a bigger creeper for simultaneously attempting to move in for a smooch).