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The Prince of Wales and the Duchess of Cornwall, known as the Duke and Duchess of Rothesay while in Scotland, during a performance of Robert Burns poetry with music by Professor Paul Mealor and the Aberdeen University Chamber Choir, at Glenmuick Church, Church Square, Ballater, Aberdeenshire. (Photo by Jane Barlow/PA Images via Getty Images)

The Prince of Wales and the Duchess of Cornwall, known as the Duke and Duchess of Rothesay while in Scotland, during a performance of Robert Burns poetry with music by Professor Paul Mealor and the Aberdeen University Chamber Choir, at Glenmuick Church, Church Square, Ballater, Aberdeenshire. (Photo by Jane Barlow/PA Images via Getty Images)

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The Prince of Wales and the Duchess of Cornwall, known as the Duke and Duchess of Rothesay while in Scotland, sign the church visitors book before attending a performance of Robert Burns poetry with music by Professor Paul Mealor and the Aberdeen University Chamber Choir, at Glenmuick Church, Church Square, Ballater, Aberdeenshire. (Photo by Jane Barlow/PA Images via Getty Images)

The Prince of Wales and the Duchess of Cornwall, known as the Duke and Duchess of Rothesay while in Scotland, sign the church visitors book before attending a performance of Robert Burns poetry with music by Professor Paul Mealor and the Aberdeen University Chamber Choir, at Glenmuick Church, Church Square, Ballater, Aberdeenshire. (Photo by Jane Barlow/PA Images via Getty Images)

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The Prince of Wales and the Duchess of Cornwall, known as the Duke and Duchess of Rothesay while in Scotland, sing Auld Lang Syne during a performance of Robert Burns poetry with music by Professor Paul Mealor and the Aberdeen University Chamber Choir, at Glenmuick Church, Church Square, Ballater, Aberdeenshire. (Photo by Jane Barlow/PA Images via Getty Images)

The Prince of Wales and the Duchess of Cornwall, known as the Duke and Duchess of Rothesay while in Scotland, sing Auld Lang Syne during a performance of Robert Burns poetry with music by Professor Paul Mealor and the Aberdeen University Chamber Choir, at Glenmuick Church, Church Square, Ballater, Aberdeenshire. (Photo by Jane Barlow/PA Images via Getty Images)