LAS VEGAS, NV - DECEMBER 10: Singer Miranda Lambert arrives at the 2012 American Country Awards at the Mandalay Bay Events Center on December 10, 2012 in Las Vegas, Nevada. (Photo by Christopher Polk/ACA2012/Getty Images)
What Were They Thinking?!
This week's worst-dressed crew includes Katy Perry, Kristen Stewart, and Kim Kardashian. -- By Matt Whitfield, Yahoo! Staff