Bright Sound Entertainment presents Big Boi — of hip-hop/soul act OutKast — and the Yorktown Throwdown at the U.S.S. Yorktown lot at Patriots Point. With support from Toronto's MSTRKRFT and local multimedia troupe Space Invaders. Big Boi's latest solo album, Sir Lucious Left Foot: The Son of Chico Dusty, was released this year by Def Jam. 7 p.m.