Rita Ora

Rita Ora

Rita Ora performed on the stage at the 33rd annual Christmas in Washington concert on Sunday. She sung to the Band Aid song 'Do They Know it's Christmas?' before Barack Obama, his wife Michelle and daughters Malia and Sasha. 

Afterwards, Ora posted pictures on her Instagram account, which show her on stage beside the Obama family. 

She captioned the message: "Indescribable honour @michelleobama (sic)"

She wrote on Instagram: "Ok I can't help it little sneak peak of my face before walking on the Obama stage. My legs were like jelly!! Thank you Audrey Hepburn for the inspiration!!#breakfastattiffs (sic)"

She wrote on Instagram: "@ralphandrusso thank you for helping me create this moment. And Bob Geldof for letting me perform do they know it's Christmas to spread the word over seas in front of such influential people. We can make a difference together (sic)"

Ora was accompanied by Dwayne Johnson who sang 'Deck the Halls' and Christina Perri sang 'Have Yourself a Merry Little Christmas'.