What is the Guest Host for the episode on 8 june 2008?
CREATE TABLE "series_7" (
  "episode_number" real,
  "air_date" text,
  "guest_host" text,
  "musical_guest_song_performed" text,
  "coat_of_cash_wearing_celebrity" text
);
SELECT "guest_host" FROM "series_7" WHERE "air_date"='8 june 2008';