President Obama's girls Malia, 13, and Sasha, 11, were besides themselves with excitement at meeting Justin Bieber at the White House.
The concert of Christmas carols and songs was hosted by comedian Conan O'Brien and was in aid of the Children's Medical Centre.
Malia had obviously put a lot of thought in her outfit for the Christmas concert in Washington, and was dressed in an eye-catching yellow mini dress in his honour.
And the junior pin-up also got a hug from their father.
Justin was joined on the bill by Cee Lo Green and Jennifer Hudson.
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