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Celebrities take on ice bucket challenge

15 August 2014 Last updated at 14:30 BST

The Ice Bucket Challenge involves people pouring cold water over themselves and posting videos on the internet.

The aim is to raise money and awareness of the neurodegenerative disease, motor neurone disease.

Many celebrities have risen to the challenge, and even President Obama has been asked, although he has yet to respond.

Jon Brain reports.