CREATE TABLE table_name_53 (song VARCHAR, artist_s_ VARCHAR, work_done VARCHAR, year VARCHAR)

Which 2006 Cobra Starship song has work done of guest vocals?
SELECT song FROM table_name_53 WHERE work_done = "guest vocals" AND year = 2006 AND artist_s_ = "cobra starship"
SELECT "song" FROM "table_name_53" WHERE "artist_s_" = "cobra starship" AND "guest vocals" = "work_done" AND "year" = 2006