Katy Perry performs for Barack Obama

The singer joined Jennifer Hudson, Stevie Wonder and Bon Jovi at Obama's '30 Days to Victory' concert

Katy Perry performed in front of star-studded crowd, that included George Clooney, at Barack Obama's '30 Days to Victory' re-election concert.

The singer was joined by fellow musicians Jennifer Hudson, Stevie Wonder and Bon Jovi during the rally to raise last minute funds for the President's campaign, and even donned a cool Obama-themed manicure for the occasion.

'Today I am so honored to play for the President!,' the singer tweeted on Sunday, adding, 'appropriate nails,' with a photo of her special nail artwork.

'I sang for President @BarackObama last night because I believe in Equal Rights #ForAll #Vote,' Perry tweeted afterwards.

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The President later attended a $25,000-per-head dinner at Wolfgang Puck's WP24 restaurant, with the two events raising an estimated $5m for the campaign.

Jay-Z and Beyonce have also been very active in supporting the President's re-election, they recently threw a lavish Obama fundraiser at the rapper's 40/40 club, raising around $4m.

JAY-Z AND BEYONCE RAISE $4M FOR BARACK OBAMA

While this side of the pond, Gwyneth Paltrow hosted an Obama Victory Fund event, attended by some famous friends including Cameron Diaz, Anna Wintour and Tom Ford, where tickets sold for up to $24,000.

GWYNETH PALTROW AND CAMERON DIAZ OBAMA FUNDRAISER