Katy Perry tweeted this photo of her nails. (Credit: @KatyPerry/Twitter)

Inside the Nokia theater last night, 6,000 people packed in for a star-studded concert to raise money for President Obama's campaign. Most of those who attended the "30 Days to Victory" event, however, were likely too far away to see the smallest display of support that appeared on stage.

Singer Katy Perry took the stage to perform "Let's Stay Together," which Obama famously crooned at a fundraiser in January. Only those closest to the stage would have seen her fingernails, which were painted red, white and blue and adorned with the Democratic donkey logo as well as the president's face. If you weren't one of those exclusive few, Perry also tweeted a photo of her nail art to her 27 million Twitter followers, along with the message, "Appropriate nails."

Earlier in the evening she tweeted, "Today I am so honored to play for the President!"