Alicia Keys is part of a star-studded line-up that will perform at the 12-12-12 concert in New York
She said: "I was born and raised in New York and I was here during everything that happened with Sandy. It really displaced people and devastated people's whole lives".
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The unexploded bomb was found near the Houses of Parliament and led to disruption in central London overnight.
Southern parts of England and Wales will see sunny skies after a frosty start.
A young child is among three deaths caused by a man who deliberately drove into crowds of people in the city centre of Melbourne.