Transcript for Alicia Keys Sings 'The Star-Spangled Banner'
The National Anthem can be a tricky -- to block at a big time event. Just ask Christina Aguilera or Steven Tyler enter R&B singer -- -- is at Super Bowl 47. The Grammy winner took the latest star spangled opportunity before -- superdome in New Orleans check it out.
This transcript has been automatically generated and may not be 100% accurate.