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NEW YORK, NY - FEBRUARY 26: Singer Solange Knowles arrives to "Late Show with David Letterman" at Ed Sullivan Theater on February 26, 2013 in New York City. (Photo by Jeffrey Ufberg/WireImage)

NEW YORK, NY - FEBRUARY 26:  Singer Solange Knowles arrives to "Late Show with David Letterman" at Ed Sullivan Theater on February 26, 2013 in New York City.  (Photo by Jeffrey Ufberg/WireImage)