Willow Smith finally raises a smile on Sasha Obama's face at White House Easter party

By DAILY MAIL REPORTER Picture of misery: Nine-year-old Sasha, centre, looks less than amused as her parents read out Chicka Chicka Boom Boom to a young audience at the White House. Her sister Malia, 12, does a much better job Willow's mother and Michelle Obama cheered her on at eventOne thing was clear for the President today - his daughter's far more interested in watching a pop star perform