Katy Perry, Jennifer Hudson and more musicians came out in support of President Barack Obama in Los Angeles on Sunday, and the president decided to return the favor. Obama showed up at the “30 Days to Victory Concert” at LA’s Nokia Theater last night and took the time to speak with some of the 6,000 supporters in attendance.

“Everybody here is incredible professionals, they’re such great friends and they just perform flawlessly night after night. I can’t always say the same,” Obama told the crowd according to the Associated Press, poking fun at his recent criticized debate appearance.

He continued, “Everything we fought so hard for in 2008 is on the line in 2012. And I need your help to finish what we started. I need your help.”

The concert was part of a recent effort by celebrities to garner support for President Obama. Perry performed “Firework” (as you can see above) and “Let’s Stay Together” while wearing a patriotic outfit decorated in stars and stripes. Hudson and Stevie Wonder also headlined the fundraiser, with Earth Wind and Fire, Jon Bon Jovi and even George Clooney making additional appearances.

In case you weren’t entirely convinced Perry is an Obama supporter, the pop star took to Twitter to show off her new nail art: four images of the president’s face alongside depictions of the democratic donkey.

Posted by:Terri Schwartz