Katy Perry performs for Obama in skintight ‘ballot’

Like Bruce Springsteen, Katy Perry has been out on the campaign trail, performing free concerts at President Barack Obama's re-election rallies. Unlike Springsteen, Perry has been wearing a pair of skintight rubber minidresses—one emblazoned with Obama's "Forward" campaign slogan, the other with her "ballot"—on the stump.

The 28-year-old pop singer performed at a rally in Milwaukee on Saturday, peeling off a red-white-and-blue dress to reveal the latex "Forward" frock.

Last month, Perry performed in her alternative road white at a rally in Las Vegas. Perry's formfitting numbers were made by Abigail Greydanus, a Los Angeles-based designer.

Springsteen—clad in jeans and a dark shirt, tie and suit vest—appeared at three Obama rallies on Monday, including one in Madison, Wis., where The Boss did a short set as well as a very convincing impersonation of the president in front of an estimated 18,000 supporters.

Kid Rock, meanwhile, has been rocking for Mitt Romney. He's set to perform Monday at an election eve rally for the Republican nominee in Manchester, N.H. Thankfully, Kid Rock is not expected to appear in a rubber minidress.