What Were They Thinking?!
This week's worst-dressed celebs include Ivana Trump, Eva Mendes, and Ke$ha.
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Ke$ha Hosts Pure Nightclub's Eighth Anniversary Celebration
LAS VEGAS, NV - MARCH 13: Recording artist Ke$sha arrives at the Pure Nightclub at Caesars Palace to host the club's eighth anniversary party on March 13, 2013 in Las Vegas, Nevada. (Photo by David Becker/Getty Images)