President Obama has led the crowd in a sing-a-long at the end of a concert at the White House paying tribute to the late Ray Charles - despite initially saying that .<br>President Obama has led the crowd in a sing-a-long at the end of a concert at the White House paying tribute to the late Ray Charles - despite initially saying that .<br>President Obama sings at Ray Charles tribute event President Obama has led the crowd in a sing-a-long at the end of a concert at the White House paying .<br>President Obama has led the crowd in a sing-a-long at the end of a concert at the White House paying tribute to the late Ray Charles - despite initially saying that .
