Ravens win US Super Bowl

The Baltimore Ravens beat the San Francisco 49ers in the Super Bowl XLVII at the New Orleans Superdome.

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Beyonce prepares to sing live at the Super Bowl

Beyonce hasn't given much away about her performance at half time during Sunday's Super Bowl - other than promising she'll be singing live. The singer admitted miming at Barack Obama's inauguration because she hadn't been able to rehearse properly.

She says there won't be a repeat of that in New Orleans during the game between the Baltimore Ravens and San Francisco 49ers.

As Beyonce makes final preparations, a clip has appeared online of one other thing she should avoid doing - handing the microphone to the crowd and asking them to sing along.

As a past performance proved, that can mean the song falls rather flat.

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