In this case, The Fray performed its chart-topper How to Save a Life while one of many montages played overhead.

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That album later rose to number one, giving the soul singer her first UK chart-topper.

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Meanwhile, one of Bieber's support acts - fellow Canadian chart-topper Carly Rae Jepsen - has pulled out of a concert for the Boy Scouts of America because of the organisation's ban on gay members.

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