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The final week continues, and the battle to become champion sees the finalists heading to Ireland.

First, the celebrities must cook lunch for the workers on Patrick Howard's farm. Patrick is one of Ireland's 830 potato farmers, who alone produce 7,000 tons of potatoes every year. The finalists must prepare three local recipes each for the hungry workers, all of which contain the majestic potato, including desserts. Will the chocolate and hazelnut potato cake be a hit?

Next, the celebrities travel to the majestic Farmleigh, originally home to the Guinness family, and home to both President Obama and the Queen on their recent state visits. Having devised their own menus, the celebrities have three hours to prepare lunch for five of Ireland's leading contemporary writers, who between them have sold millions of books worldwide. Can their food live up to the esteemed guests and prestigious surroundings?

Only one contestant can be crowned Celebrity MasterChef Champion 2011.