How many singles does Lisa Stansfield have?
CREATE TABLE "table1_26400075_2" (
  "entered_a" text,
  "weeks_in_top_10" real,
  "single" text,
  "artist" text,
  "peak" real,
  "peak_reached_a" text,
  "weeks_at_peak" real
);
SELECT COUNT("single") FROM "table1_26400075_2" WHERE "artist"='Lisa Stansfield';