katy perryI'm not sure what made 2012 most remarkable: the presidential election, Superstorm Sandy, the Mars Rover, or dip-dyed celebrity hair. It was, indeed, a banner year for some terrible hairstyle decisions -- stars just couldn't get enough of rainbow hues, old lady hues, and curling irons.

While there were some celebrities who managed to keep it together this year (Gwyneth Paltrow had great hair in 2012, as did Miley Cyrus) there were a handful who just couldn't resist messing with a good thing. Here are the 5 worst celeb hairdos of 2012.