Katy Perry is doing all she can to help Barack Obama secure the presidency for a second term and that includes wearing a figure-hugging dress to attract voters.

The 'Wide Awake' star took to the stage at a rally in Las Vegas on Wednesday and made sure all eyes were on her wearing a skintight ballot paper-style dress complete with tick boxes beside the Obama, Joe Biden and Mitt Romney options - the Romney box was unticked.

"Don't wait. Go tomorrow. How many of you are 18 here? It's going to be your first time, right?" Katy told the crowd.

As Katy performed, images of Obama and his 'Forward' slogan flashed across the screen before the man himself took over the mic in a last-ditch attempt to encourage his supporters to vote in his favour.

"I sang for President @BarackObama last night because I believe in Equal Rights #ForAll #Vote," Katy wrote on Twitter after the rally.

That dress is sure to get people voting! Check out the pics below...

Katy Perry Supports Barack Obama In Figure-Hugging Dress...