CREATE TABLE table_63570 ("Song" CLOB, "Performer" CLOB, "Original artist" CLOB, "Length" CLOB, "Recorded" CLOB)

Who is the original artist of 'Let's Dance'?
SELECT "Original artist" FROM table_63570 WHERE "Song" = 'let''s dance'
SELECT "Original artist" FROM "table_63570" WHERE "Song" = 'let''s dance'