Katy Perry performed at a rally for President Barack Obama in Wisconsin, wearing a skin-tight blue rubber dress that had his presidential slogan, “Forward” across the front.

(View pictures here.)

Coincidentally, Obama's slogan "Forward" is also Wisconsin's state motto.

Halfway through the set, which took place on Saturday, the popstar encouraged her fans to contribute to the Red Cross and Hurricane Sandy relief efforts.

As one of the many celebrities who want to see Obama re-elected, Perry has been very vocal about her support of the president. Other famous people who have been publicly supporting Obama at rallies and various fundraisers include Kerry Washington, George Clooney, Eva Longoria, Beyonce, and Jay-Z.

This is not the first time Perry has shown her support for Obama during a concert. Just last month, Perry wore a white rubber dress that resembled a ballot slip. It read, “President of the United States” in black letters.

A square next to Obama and Vice President Joe Biden was colored in, while Presidential nominee Mitt Romney’s square was left blank.

Perry is not the only artist who plans to perform at an Obama rally.

Obama is getting another strong push from avid supporter Jay-Z, who is set to perform in Columbus, Ohio at an Obama rally on Nov. 5, along with Bruce Springsteen. Ohio is a swing state, and therefore it is significant that these two superstars are showing their support for Obama in this crucial state.

This is certainly not the first time Jay-Z has shown his support of Obama.

Earlier this month, Jay-Z was featured in a new video released by the Obama campaign.

"When the president got into office initially, what he represented to a nation of kids was hope.

"You know, the hope of people all across the country, who would look and see themselves, and the possibilities,” Jay-Z says in the "Power of Our Voice" advertisement. 

“For so long, there was this voice that was silenced out there as far as exercising your right to vote.

"I think it was a voice that was silent because people had lost hope. They didn’t believe that their voice mattered or counted,” Jay-Z goes on to say.