Beyonce admits miming at Obama inauguration

Beyonce Knowles sang with a pre-recorded track at President Obama's inauguration because she didn't have enough time to rehearse.

The 'Halo' hitmaker admitted she was so busy preparing for Sunday's Super Bowl half time performance that she had didn't get to adequately prepare her version of the US national anthem 'The Star Spangled Banner' for January 21 but insisted she will sing live at the Super Bowl.