Beyonce singing during President Obama's inauguration
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Vocal coach: Beyonce did lip-sync at Obama inauguration

23 January 2013 Last updated at 19:20 GMT

At the inauguration of President Obama, did Beyonce lip sync the US National Anthem? There are conflicting reports from Washington but the lady herself is keeping quiet.

A spokeswoman for the US Marine band has confirmed the band itself was not playing live and could not comment on whether Beyonce's performance was pre-recorded.

To help demystify whether or not Beyonce sang live, Jon Sopel was joined Becky Gilhespie. a singing teacher at Soho Vocal Tuition in London.