Stevie Wonder, Sheryl Crow, Aretha Franklin and Ledisi performed at the rescheduled MLK memorial dedication on Sunday, which was postponed due to Hurricane Irene.

Among the tens of thousands that came to the dedication, all of the Obamas were there: Barack, Michelle, Malia, Sasha, and Michelle's mother Marian Robinson (she lives at the White House and is a very active member of the family). VP Joe and Jill Biden were there too, as were descendants of Dr. King.

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