The Big Breakthrough Choir sing in front of Edinburgh Castle
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Olympics opening ceremony will showcase Edinburgh choir

11 July 2012 Last updated at 14:22 BST

How would you feel if you were told that in a few weeks time you had to sing for the majority of the world's population?

That is exactly what happened to a choir of young people from Edinburgh's Broomhouse Estate.

The Big Breakthrough choir has made a video of Flower of Scotland to feature at the opening ceremony for London 2012.

BBC Scotland's Gavin Walker went to watch them film it.