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Lesley Garrett has performed at a gala evening in aid of the St Botolph's church restoration fund.
The opera singer sang to more than a 1000 people and was accompanied by the South Lincolnshire Chamber Choir, Cantemus and pianist Andrew West.
The Boston Stump restoration appeal aims to raise £3 million to improve facilities for worshippers and visitors.
Lesley said:"It's a unique church and it needs money to develop."