NEW YORK, NY - DECEMBER 12: Actress Kristen Stewart speaks onstage at "12-12-12" a concert benefiting The Robin Hood Relief Fund to aid the victims of Hurricane Sandy presented by Clear Channel Media & Entertainment, The Madison Square Garden Company and The Weinstein Company at Madison Square Garden on December 12, 2012 in New York City. (Photo by Larry Busacca/Getty Images for Clear Channel)
What Were They Thinking?!
This week's worst-dressed crew includes Katy Perry, Kristen Stewart, and Kim Kardashian. -- By Matt Whitfield, Yahoo! Staff