Presidential Election 2012: Musicians on the Campaign Trail

Katy Perry performs at a campaign rally for U.S. President Barack Obama at Doolittle Park on October 24, 2012 in Las Vegas, Nevada.

It's time for America to elect the next U.S. president, but over the past several months, dozens of musicians have stood up and shown their support for either Mitt Romney or Barack Obama. See photos of stars performing, rallying, and rubbing elbows on the 2012 campaign trail.