Katy does another free concert Katy Perry Fri-02-Nov-12 17:39 Share this By Megan SlovakKaty Perry is set to stage a free concert in Milwaukee, Wisconsin this weekend to help rally last-minute support for incumbent U.S. President BARACK OBAMA ahead of the elections on Tuesday.The I Kissed A Girl hitmaker has become one of the politician's biggest celebrity supporters as he fights for a second term at the White House and she recently performed at a fundraising event in Los Angeles and at a campaign rally in Las Vegas last month, when she wore a white latex dress designed to look like ballot paper.The singer has now signed up to play her third pro-Obama gig in the swing state of Wisconsin on Saturday. She'll appear alongside the leader as part of a campaign to energise young citizens in the run-up to the big day.Perry isn't the only famous face putting in extra work ahead of the elections - actress Eva Longoria and singers Stevie Wonder, Marc Anthony and Dave Matthews are all due to appear at Democratic events in the next few days. You May Also Like Jay-Jay murders Katy Perry's 'Birthday' in Headphone Karaoke Jay-Jay, Mike & Dom's Rude Awakening - Zara gets woken up by the Auckland Brass Band playing Katy Perry! Edge listener Adrian faces his fear of cotton balls (yeeeep) to win his daughter Katy Perry tix! Become a fan of The Edge on Facebook and on Twitter .