Katy Perry and Jennifer Hudson sing for Obama

Earth, Wind & Fire also played at the 30 Days to Victory concert at the Nokia Theater to pull in last-minute donations for Obama's campaign, ahead of the elections next month (Nov12).

Obama was the guest of honor at the sold-out event, where actor George Clooney also made a special appearance to introduce Wonder.

Perry took to Twitter.com to show off her patriotic manicure, featuring the President's face, writing, "Appropriate nails... Today I am so honored to play for the President!"

After the show, Obama headed next door to Wolfgang Puck's chic WP24 for an exclusive dinner where VIP guests paid $25,000 per plate.

It is estimated the two events pulled in as much as $5 million for Obama.

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