The former US president, Barack Obama made a surprise appearance at Michelle Obama's book tour in Washington and even compared himself to Jay-Z at a Beyoncé concert.
"This is like - you know when Jay-Z comes out during the Beyoncé concert? ... Like, Crazy in Love?" he said, referring to instances when the rapper appears at his wife's concerts during performances of her famous song. "It's the same thing. It's just a little sample to enhance the concert."
When the former president appeared on stage, an audience member yelled, "we miss you!" as the crowd cheered.
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