CREATE TABLE table_6726 ("Year" FLOAT, "Male" TEXT, "Female" TEXT, "Band" TEXT, "Album" TEXT, "Pop Act" TEXT, "Lifetime Achievement Award" TEXT)

What band performed when Samantha Mumba presented?
SELECT "Band" FROM table_6726 WHERE "Female" = 'samantha mumba'
SELECT "Band" FROM "table_6726" WHERE "Female" = 'samantha mumba'