R&B star D’Angelo, who ended a 15-year hiatus from the recording industry with the excellent album "Black Messiah" last year will play a special rooftop show on March 15 during the South by Southwest Interactive conference, Mashable reports. Soul singer, goddess of New Jack Swing hip-hop hooks Mary J. Blige, will also play a Samsung concert on March 17. The shows will be private, invite-only events, but Samsung owners will be able to access performance videos through the Milk Video app, the tech blog reports.