>> Following on the heels of MC Hammer and salsa legend Willie Colon, rock ‘n’ roll pioneer and TV commercial pitchman Little Richard brings his falsetto scream to a free outdoor concert, with openers D.C. female soul vets, the Jewels. 7 to 9 p.m. at at Woodrow Wilson Plaza, 1300 Pennsylvania Ave. >> Emmanuel Jal, a “lost boy of Sudan” who is the subject of his own upcoming documentary, War Child, will perform his…