Plot: Keith Lemon challenges stay-at-home dad Simon, aeronautical engineer Adam, art student Kisa and designer and part-time clown Gem to create landmarks from around the world that must illuminate, in a bid to impress Keith and be picked to go through to create a one-off craft for this week's celebrity client, Spice Girl Mel B. Keith chooses his favourite three to go on to craft for Mel, who wants a bespoke feature for her well-being room