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9 January 2014, 11:17
Members of the Royal Philharmonic Concert Orchestra play music with glasses of water.
The musicians have swapped their usual instruments for hundreds of glasses of water to play versions of pop hits such as Katy Perry's 'Roar', Taylor Swift's 'Knew You Were Trouble' and One Direction's 'Story Of My Life'.
The live performance took place in London's Tower Hill to raise awareness of WaterAid, a charity that aims to provide people everywhere with safe, clean, drinking water.
Watch the amazing video above!